People v. Cauble CA4/1 ( 2020 )


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  • Filed 12/23/20 P. v. Cauble CA4/1
    NOT TO BE PUBLISHED IN OFFICIAL REPORTS
    California Rules of Court, rule 8.1115(a), prohibits courts and parties from citing or relying on opinions not certified for
    publication or ordered published, except as specified by rule 8.1115(b). This opinion has not been certified for publication
    or ordered published for purposes of rule 8.1115.
    COURT OF APPEAL, FOURTH APPELLATE DISTRICT
    DIVISION ONE
    STATE OF CALIFORNIA
    THE PEOPLE,                                                     D076215
    Plaintiff and Respondent,
    v.                                                    (Super. Ct. No. SCD275889)
    JEFFREY DUANE CAUBLE,
    Defendant and Appellant.
    APPEAL from a judgment of the Superior Court of San Diego County,
    Louis R. Hanoian, Judge. Reversed and remanded.
    Thomas E. Robertson, under appointment by the Court of Appeal, for
    Defendant and Appellant.
    Xavier Becerra, Attorney General, Lance E. Winters and Julie L.
    Garland, Assistant Attorneys General, Michael P. Pulos, Joseph Christian
    Anagnos and Kathryn A. Kirschbaum, Deputy Attorneys General, for
    Plaintiff and Respondent.
    In 2019, a jury convicted Jeffrey Duane Cauble of the 1979 second
    degree murder of C.W. (Pen. Code,1 § 187), and found true allegations that
    Cauble personally used a knife in the crime’s commission (§ 12022, subd.
    (b)(1)). The court sentenced Cauble to 15 years to life plus a one-year
    enhancement for the knife use allegation. Both before and after trial, the
    trial court denied Cauble’s motions to dismiss the case on grounds of
    unjustified precharging delay. It denied Cauble’s posttrial motion for a new
    trial claiming counsel’s prejudically ineffective assistance.
    Cauble contends: (1) 40 years of precharging delay deprived him of his
    due process right to a fair trial; (2) his defense counsel provided prejudicially
    ineffective assistance by failing to call a forensic expert, breaking a promise
    he made during opening statements that Cauble would testify at trial, and
    failing to challenge improper and prejudicial evidence; and (3) the prosecutor
    committed prejudicial misconduct by vouching for an erroneous fact not in
    evidence.2
    We reject Cauble’s claim of prejudicial precharging delay. However, we
    agree that his counsel’s errors, combined with the prosecutor’s improper
    closing argument discussing a scientific fact not in evidence—which
    undermined Cauble’s theory of self-defense—require a new trial. We reverse
    the judgment.
    1     Undesignated statutory references are to the Penal Code.
    2     Cauble has also filed a petition for writ of habeas corpus. We ordered
    the writ petition considered with this appeal so as to determine whether an
    order to show cause should issue. By separate order we deny the petition as
    moot.
    2
    FACTUAL AND PROCEDURAL BACKGROUND3
    C.W.’s 1979 Killing and Investigation
    In the afternoon of February 5, 1979, C.W., a taxi driver, was found
    stabbed to death in bed at his home. He was unclothed in a curled up
    position. C.W. had suffered multiple stab wounds, the first probably through
    his neck, perforating one carotid artery and severing the other. He had
    several knife wounds to his back, some that penetrated his lungs. C.W. did
    not have any defensive wounds to his hands. C.W.’s bedding had cut marks:
    12 in a blanket and eight in a sheet.
    Paul Ybarrondo, then a sergeant in the San Diego Police Department in
    the homicide unit, investigated and supervised the team that responded to
    the scene. Ybarrondo did not see signs of forced entry. He observed drinking
    glasses, cigarette butts and ashtrays in the living room as well as clothing
    indicating the victim and another person had removed their clothes there
    then went to the bedroom. An evidence technician collected items including
    the drinking glasses and some of the remaining liquid, the ashtrays and
    cigarette butts, two towels, C.W.’s bedding, and miscellaneous pieces of paper
    in a small wooden chest with names and phone numbers written on them.
    Underneath the wooden chest the technician found and collected a napkin
    with handwriting having Cauble’s name, social security number, birth date,
    driver’s license number, and the words, “Camp Pen.” The technician
    obtained fingerprints from a glass tumbler, ashtray, bottles of alcohol and the
    pieces of paper. He impounded the blanket and sheet. A steak-type knife
    3    This court granted Cauble’s unopposed requests to augment the record
    on appeal.
    3
    was found in the sink but it did not have usable fingerprints.4 No drugs were
    found in C.W.’s apartment. Given the nature of the crime scene, the
    technician took and impounded swabs from various parts of C.W.’s body,
    including his mouth and penis.
    A criminalist tested the sheets, blankets and towels and found type O
    blood on them. One sheet and blanket had apparent one-half to three-eighths
    inch cuts on them. She detected type O blood in swabs collected in the
    bathroom. She was unable to detect saliva on either of the drinking glasses.
    The criminalist did not test the contents of one glass for alcohol or drugs
    because she was not told the liquid had been separated into a test tube;
    however, she explained testing capabilities were more limited then and she
    was not sure so-called “date rape” drugs, which dissipate quickly, could be
    found in the liquid. At the time, she was able to test for barbiturates,
    amphetamines, narcotics and alcohol. 174 latent finger print cards were
    collected from the crime scene, but not all of them were suitable for
    comparison. Some of the prints were eventually identified as being from
    C.W.’s former roommate and the roommate’s girlfriend.
    Sergeant Ybarrondo checked the pockets of the clothing on the floor
    and found C.W.’s wallet, which contained no money. He acknowledged
    learning about the napkin with Cauble’s name. Ybarrondo was not aware of
    follow up efforts with regard to the napkin, though it was something he
    would have directed his team to follow up and determine who the person was
    and his connection to the case. Sergeant Ybarrondo’s team interviewed more
    4     The People presented evidence that C.W.’s kitchen had a shelf with an
    open silverware tray on it. The investigating sergeant agreed that an
    investigator noted the tray was “where potentially the murder weapon could
    have come from.”
    4
    than 20 people and conducted different avenues of follow up investigation.
    However, at some point, the investigation became “cold” because leads had
    gone nowhere.
    In 2004, David Cornacchia, a criminalist working on cold cases for DNA
    evidence reviewed C.W.’s case. He was able to ascertain the victim’s DNA as
    a reference, and determined there was DNA from a foreign contributor on the
    victim. Cornacchia notified the homicide team that if they developed a
    suspect, they could ask him to do a comparison.
    In 2006, the case was reopened when investigators uploaded an
    unknown fingerprint from the scene into a database, producing a hit for
    Cauble. Such hits do not automatically result in an arrest, as it is just one
    lead requiring follow up including to rule out other potential suspects.
    In December 2008, then San Diego Police Department Detective John
    Tefft was assigned to the cold case. He reviewed all the evidence and learned
    that Cauble had been identified as a source of two fingerprint impressions
    that were confirmed by the laboratory in 2007. He followed up on those as
    well as a woman’s prints found at the scene. The woman had dated one of
    C.W.’s roommates. As to Cauble, nothing in the reports or evidence other
    than the cocktail napkin related to him; the detective recalled finding an
    address book and contacted friends or relatives of C.W. but was unable to get
    leads on why Cauble would be present at the scene. He eventually obtained a
    search warrant to get Cauble’s DNA and fingerprints.
    In March 2009, Tefft interviewed Cauble at Cauble’s Colorado home
    about the murder. Cauble denied knowing C.W. or being in his home. In a
    follow up telephone call the next day, Cauble again told Tefft he was not at
    C.W.’s house. Cauble asked why it took so long for police to contact him, and
    Tefft explained based on his experience that computer, DNA and fingerprint
    5
    technology had changed remarkably from 1979. Tefft also floated a possible
    scenario to Cauble based on his past experience and training so as to
    communicate to Cauble that he was open to hearing about the situation.
    Tefft explained to Cauble that in the detective’s experience, “many times back
    in 1979 especially, in that era, many times military personnel, they’re away
    from home the first time, they are kind of young. Sometimes they get
    befriended by folks, usually gay men, and they take them back to their home
    and they sometimes have sex. The next day there is remorse, some shame,
    and sometimes violence occurs. I have investigated that as a police officer
    several times in my career.” When Tefft asked Cauble if something like that
    happened, Cauble responded that he would not know as he was not at the
    crime scene. Detective Tefft informed Cauble that additional laboratory tests
    might reveal Cauble was present at the crime scene, and Cauble responded:
    “If I see you again, it’s because I’ll be going back to San Diego with you. I’ll
    just have to straighten this thing around in court.”
    The following month, Detective Tefft had criminalists compare Cauble’s
    DNA sample against the penile and mouth swabs taken from C.W. There
    was either no DNA or not enough DNA from the drinking glasses to draw
    conclusions. The lab results showed strong support that Cauble was a
    contributor to the DNA in both penile and mouth swabs, however. DNA from
    blood on the towel and from two of the cigarette butts matched Cauble’s
    DNA. But no DNA was found on a soda bottle, and Cauble was excluded as
    the source of DNA from the bedding. Detective Tefft retired in mid-2009.
    In May 2009, a new detective was assigned to the case. He interviewed
    witnesses, and specifically sought to locate a man, Francisco Guizar, who had
    been seen running from the property on the day C.W.’s body was discovered.
    6
    The detective obtained new DNA results pointing to Cauble’s presence at the
    scene.
    In June 2011, the detective decided to again interview Cauble. The
    recorded interview took place in the detective’s vehicle in a parking lot. At
    the outset, Cauble expressed concern about being arrested but the detective
    told him that would not happen. During this interview, Cauble did not deny
    his fingerprints were found in C.W.’s house, but claimed he did not remember
    being there. When the detective told Cauble his DNA was found on C.W.’s
    penis, Cauble claimed not to remember anything, and stated: “The only thing
    I could think of is that, uh, you know, the guy probably drugged me and, you
    know, I don’t remember a thing about it, and then probably seduced me.
    That’s the only thing I can think of.” When asked whether that happened,
    however, Cauble said, “As far as I know, no, it did not happen.” Cauble
    denied having sex with men. After Cauble was told his semen was found in
    the victim’s mouth, he told the detective he was apparently drugged, raped
    and his wallet taken, but said he did not remember that happening, losing
    consciousness, or waking up in someone’s house. Cauble denied getting into
    a fight with the victim, being angry, or murdering anyone. The detective
    thought it was significant that Cauble did not remember waking up from a
    state of unconsciousness. The detective did not arrest Cauble that day
    because the purpose of his visit was to get Cauble’s explanation of what had
    happened. The detective presented to district attorneys the recording and a
    written record of what he had learned from the interview. He retired in 2012.
    In 2017, an expert determined that the handwriting on the napkin
    found in C.W.’s apartment was probably C.W.’s. In about May of that year,
    the San Diego Police Department cold case unit presented C.W.’s case to the
    district attorney and a new investigator, Sandra Oplinger, was assigned.
    7
    Oplinger reviewed all of the police reports from 1979 and subsequent
    investigations, as well as the evidence, which was still labeled and secure
    within its packaging. She was aware Cauble had denied being at C.W.’s
    apartment, knowing him or having a sexual relationship with him. She
    decided to conduct a jail operation on Cauble to get him to brag or talk about
    the matter.
    In March 2018, police arrested Cauble and put him in a cell with an
    undercover officer posing as an inmate. At one point, Oplinger entered the
    cell and while speaking to Cauble held up an autopsy photo of C.W. When
    the undercover officer asked Cauble if he saw the photo and told Cauble it
    appeared the victim had bullet holes, Cauble responded that the victim “died,
    from a stabbing,” and laughed. Cauble remarked, “They don’t have shit on
    me. Not after 35 years.” Cauble also told the officer his blood was at the
    scene because there was a fight. Cauble explained: “This was a gay guy. [¶]
    . . . [¶] He was a taxi cab driver. I was a Marine. [¶] . . . [¶] . . . I was all
    fucked up, he picked me up, I was going to go to a motel. [H]e said come over
    to my place (unintelligible) drugged me and the drugs (unintelligible). [¶]
    . . . [¶] . . . And he drugged me, uh, he raped me. [¶] . . . [¶] And, uh, I
    confronted him (unintelligible), we started fighting I got the better half
    (unintelligible).”
    Two days later, Cauble spoke with his wife in a recorded jail call. In
    part, he told her he would be extradited and booked for murder, and
    expressed concern that if he was found guilty he would be going to jail
    forever, and would become suicidal. When his wife remarked that he did not
    do it and would get out, he responded, “Wait a minute, I killed a man. [¶] . . .
    [¶] . . . But let me tell you something, . . . he lied to me, then he drugged me,
    they have this on . . . and not only did he drug me, he stole from me, not only
    8
    did he steal from me, he followed me, and he, and I, and I killed him. It was
    self-defense that’s all it was, was self-defense I swear to God. It was self-
    defense.” Cauble’s wife reminded him the call was being recorded, and
    Cauble said, “It’s on. It’s, that’s what I’m gonna, that’s, that’s what I’m,
    that’s what I’m gonna go by. You know, I’m, I’m gonna go with, I’m gonna go
    with that and I’m speaking the truth.” After further conversation, Cauble
    told his wife that the victim was gay and drove a taxi; Cauble entered his taxi
    to go somewhere but ended up going with the victim to his place, where he
    was drugged by something he drank in a cup. Cauble told his wife the victim
    tried to rape him, and that his own DNA was found on the victim’s penis.
    Prosecutors charged Cauble days after his interview and telephone call.
    In June 2018 a criminalist tested the two liquids from the drinking
    glasses and detected no date rape drugs or other controlled substances. She
    tested for ethanol, but the amounts were at such a low percent that she could
    not say it was an alcoholic beverage. She agreed that result could be
    explained by evaporation.
    Motions to Dismiss for Pretrial Delay
    Before trial, Cauble moved to dismiss all of the charges against him,
    claiming unconstitutional, unjustified and prejudicial “pre-complaint delay”
    in the prosecution of the case. Cauble stated he was out at a bar and about to
    complete his enlistment with the Marine Corps when C.W. enticed him to
    come to his apartment and drugged him. Cauble stated he awoke to find
    C.W. attempting to sodomize him and it was C.W. who produced the knife,
    which Cauble used to stab C.W. in self-defense. Cauble argued he suffered
    extreme prejudice by investigators’ failure in 1979 to determine whose
    handwriting was on the napkin, follow up on the information on the napkin,
    or test the contents of the liquid in the drinking glasses found at the scene.
    9
    Cauble also argued that the FBI had his fingerprints on file as of 1976, but
    police did not call the FBI or authorities for his military record to identify the
    fingerprints found at the scene. He argued several critical witnesses who
    would have testified about C.W.’s character, habits and customs had since
    died, including one of C.W.’s friends who found the body, two individuals who
    saw C.W. on the night he died, a former roommate, and cab drivers or cab
    company employees who knew C.W. and interacted with him on the morning
    of C.W.’s death. He pointed out that two of the investigating detectives were
    deceased. According to Cauble, material evidence was “essentially” lost or
    destroyed including the napkin (which he claimed was ignored for 30 years)
    and contents of the drinking glass, which had not been tested by the
    criminalist in 1979.5 He maintained the lost witnesses, dimmed memories,
    and lack of physical evidence severely prejudiced his ability to fully and fairly
    put on a defense, and the People lacked any reasonable justification for the
    prolonged delay in prosecuting him.
    In opposition, the People pointed out Cauble’s fingerprint was not
    identified until 2007 and they did not develop enough evidence to charge him
    until his March 2018 admission to the undercover police officer. They asked
    that Cauble’s motion be deferred until after trial, arguing he could not
    establish nonspeculative, actual prejudice until the court could assess
    testimony and evidence of Cauble’s guilt. In part, the People argued there
    was no evidence or indication the preindictment delay was intentional or
    done to gain a tactical advantage, given the limited technology and efforts by
    detectives to run new tests, confirm old ones, and re-contact witnesses.
    5     Cauble pointed out that the contents of the drinking glasses were
    presently being tested, but the laboratory had not issued results as of October
    2018.
    10
    Recounting the substance and significance of various witness’s testimony,
    they argued Cauble could not establish actual prejudice from missing
    witnesses or evidence, the justification for the investigatory delay far
    outweighed any prejudice to Cauble from the passing of time, and the strong
    evidence of Cauble’s guilt weighed against any prejudice caused by the delay.
    After hearing lengthy arguments and relying on the principles in
    People v. Nelson (2008) 
    43 Cal.4th 1242
    , the court denied the motion without
    prejudice to it being renewed at the trial’s conclusion. It found Cauble had
    not shown any delay designed to create a tactical advantage for the
    prosecution. The court found no indication of negligence, pointing to the
    existence of numerous latent prints and items of paper with names and
    addresses found in C.W.’s apartment, as well as the absence in 1979 of any
    connection between Cauble and the latent print. The court found the People
    showed strong justification for the delay, and in view of the questionable
    admissibility and speculative nature of the lost witness testimony, Cauble
    had not made an adequate showing of prejudice to establish a due process
    violation.
    Defense Counsel’s Motion to Withdraw
    In December 2018, Cauble’s retained defense counsel moved for a
    continuance of the trial date on grounds he had recently been served with an
    additional 852 pages of discovery, he had been given revised jury instructions
    using 1979 law, he needed to retain a handwriting expert, and his wife was
    extremely ill in hospice care for late-stage terminal cancer. The court
    continued the trial to late January 2019.
    About 10 days before trial, Cauble’s attorney moved to withdraw as
    counsel of record on grounds he was experiencing difficulty in effectively
    conducting the case after his wife’s recent death. Counsel asserted his
    11
    mental and physical condition rendered him unfit: his wife’s prolonged illness
    and death “devastated [him] both emotionally and physically” and
    antianxiety and sleep medications prescribed for him were not working.
    Counsel stated he was unable to carry out his duties to Cauble competently
    under the circumstances, and it was in Cauble’s best interests that he
    withdraw from representation. After an unreported chambers conference
    concerning the request however, counsel withdrew the motion.6
    Trial Opening Statements and Testimony
    The prosecutor in her opening statement recounted parts of Cauble’s
    interview with the detectives who visited him in Colorado and his denials
    that he knew C.W. or was at C.W.’s apartment. She pointed out that Cauble
    proposed to detectives he had been drugged and raped, but did not remember
    it. The prosecutor explained Cauble had denied being in a fight or
    confrontation. She told the jury they would hear Cauble tell the undercover
    officer that C.W. had raped him and that Cauble confronted and stabbed
    C.W. and “got the better of him.” She said the People would ask the jury to
    find Cauble guilty of murder.
    In his opening statement, Cauble’s defense counsel told the jury the
    case was not a “whodunit”; that Cauble had killed C.W. but the issue was
    why he had done so. Counsel told the jurors he would “tell [them] what I
    think the evidence will show.” He proceeded to recount the events of the
    night and morning before C.W.’s death in detail from Cauble’s perspective,
    relating details as to why Cauble went to a downtown bar, his conversation
    6     The court’s decision to conduct this chambers conference without a
    court reporter is inexplicable. A matter of such critical importance should not
    have been left unreported. Trial courts must be mindful that a party in a
    criminal case is entitled to a sufficient record to provide him or her a
    meaningful appeal. (People v. Callahan (1985) 
    168 Cal.App.3d 631
    , 632.)
    12
    with C.W., what Cauble remembered after he arrived at C.W.’s apartment,
    what C.W. said to him, Cauble waking up sexually aroused with C.W.
    attempting to sodomize him, and the ensuing fight. According to counsel, the
    stabbing was in self-defense: C.W. produced a knife and “drew first blood,”
    which explained Cauble’s blood at the scene, but Cauble, a “20-year-old
    combat-ready Marine,” struggled with C.W., took the knife away and
    “stab[bed C.W.] multiple times, wildly.” Counsel said, “He’ll probably—he
    will testify [he stabbed C.W.] in a blackout or a partial blackout as a result of
    being roofied by [C.W.]” Counsel told the jury Cauble went back to Camp
    Pendleton with a “very, very fuzzy memory of what occurred,” and described
    it as a “nightmare, as a matter of fact.” Counsel stated the evidence would
    show Cauble and C.W. “were in a fight and that Mr. Cauble had reasonable
    cause to believe and be in fear of his life." He told the jury that Cauble would
    explain some of his answers to detectives during the 2011 interview about
    C.W.’s murder. Counsel concluded: “You’ll have to listen very carefully to
    the testimony of Mr. Cauble. He is a decent person and lived a relatively
    good life, like all of us and all of you.”
    During trial, the People presented evidence that in 1979, forensic
    analysts performed blood typing but there were no computer fingerprint
    databases available, and DNA testing was very limited. In 1979, the
    nationwide CODIS (Combined DNA Index System, see People v. Buza (2018)
    
    4 Cal.5th 658
    , 668) database did not exist. DNA typing did not start in San
    Diego until 1996 or 1997. Computer capabilities were not the same as today.
    When working with the military, investigators had to do personal or
    telephone contact with military authorities to track people down.
    Fingerprints were sent to a laboratory and handled manually by comparing
    the unknown print with a known print.
    13
    Detective Tefft was permitted to testify that he advised Cauble of his
    experience investigating crimes of violence involving young military
    personnel who experience shame and sometimes violence after befriending
    and having sex with gay men.
    Criminalist Cornacchia testified about his 2004 testing of various items
    for DNA on C.W.’s murder case. He related how he found only Cauble’s DNA
    on a hand towel found in C.W.’s bedroom. He found Cauble’s and another
    person’s DNA on another towel. As for C.W.’s bedding, Cornacchia excluded
    Cauble and C.W. as DNA contributors as to one sample. He identified C.W.
    as a contributor to another sample. He excluded Cauble from the remaining
    DNA profiles from the bedding. Cornacchia did not draw conclusions about
    the cuts in the bedding. However, he explained why he focused on the red
    stains in C.W.’s bathroom, stating he had worked on stabbing cases in which
    the homicide perpetrator injured himself and would use the bathroom at the
    scene to tend to the wound before leaving. He said, “When I saw that blood
    mixed with water, I thought to myself perhaps the individual had injured
    themselves and were attempting to clean up.” But Cornacchia either got no
    DNA at all or got such a small amount that it was unsuitable for
    interpretation.
    Investigator Oplinger testified about her investigation and decision to
    conduct the jail operation. She described it as a “last effort” done when a case
    comes to a “dead end.” She also testified that she had reviewed the blanket
    and sheet, and what caught her attention was they both had multiple stab
    wounds in “very close proximity of each other.” When asked the significance,
    she stated: “[B]ased on my training and experience, based on shooting also,
    to have a close proximity like that it is not random all over. This was very
    controlled, in my opinion, controlled stabs. They’re very close proximity. And
    14
    in my opinion—I’m not an expert—but it doesn’t appear that the victim was
    moving about a whole lot because it is so close.” Counsel asked Oplinger:
    “The concentration of . . . these cut wounds, would they appear to be
    consistent with the injuries or the stab wounds on the victim that you saw?”
    Oplinger responded, “I would think so, yes.”
    The People played audio and video recordings of Cauble’s statements to
    the undercover officer while in jail.7 They also played the recording of
    Cauble’s jail visit with his wife in March 2018. Following the playing of the
    call, this sidebar exchange took place:
    “[Defense counsel]: This changes the scenario. . . . I’ll tell you why
    very briefly. I don’t know this—this is another media thing. I never got
    video of that tape. All I got was a transcript of [Cauble’s wife] and his
    conversation. That’s okay. That’s fine. But it changes my scenario where he
    may—he—I need to talk to him. . . . He may not testify now. I have to give
    him an opportunity to tell me what he wants to do.” Counsel advised the
    court he did not have any other witnesses. The prosecutor responded that
    the recording was part of discovery and played at the preliminary hearing.
    She stated she had given counsel a list and transcripts of everything she
    would be playing. Defense counsel clarified, “I don’t remember seeing it at
    the prelim[inary hearing], but hey, you know, I’m not saying it wasn’t. I just
    don’t recall.”
    7      The video of the jail operation apparently shows Cauble making a
    stabbing motion when describing how the victim died. Defense counsel
    initially objected to playing the videotape of the jail operation, claiming he
    had never seen it and it was not produced in discovery. The prosecutor
    explained defense counsel had received a CD with both the audio and video
    on it. The court had the prosecutor play the video for defense counsel, who
    then told the court he had no objection to it being played to the jury.
    15
    Following a break, the court addressed the prospect of Cauble resting
    without putting on a case, and addressed him: “Ultimately, the decision, Mr.
    Cauble, as to whether or not you testify, you have an absolute right to remain
    silent, which [defense counsel] has stated you intend to invoke. You also
    have an absolute right to testify. In other words, whether you get on the
    stand and testify is completely up to you. I just want to make sure that the
    decision for you not to testify is yours.” Cauble responded: “The decision is
    my own, Your Honor.”
    Cauble did not present evidence in his defense.
    Closing Arguments
    The prosecutor began her closing argument by telling the jury that “the
    only reasonable interpretation of all the evidence here is that Mr. Cauble and
    [C.W.] engaged in sex and that then Mr. Cauble brutally murdered [C.W.]
    while he was sleeping in his bed and then left.” She recounted what she said
    was the evidence of what occurred on the evening and early morning hours
    before C.W.’s death. She told the jury it was logical that C.W. and Cauble
    went to C.W.’s apartment and had a consensual social interaction based on
    the scene: the alcohol, Cauble’s fingerprints on the glasses and liquor bottles,
    the cigarette butts in the ashtray from Cauble smoking, the clothing on the
    floor, and C.W. unclothed in bed. She argued:
    “[Cauble was a]ctive, pouring his own drinks. How do we know that?
    Fingerprints on the liquor bottles. Again, smoking. And the way those
    clothes are like that, right, the way his clothes are taken off right there, that
    is evidence that they were drinking in here. They were—Mr. Cauble, at
    least, because there is no evidence of [C.W.] smoking any cigarettes.
    Smoking cigarettes, alert, probably drinking though. There is no question
    there is alcohol being consumed here.
    16
    “Again, we’re talking about you may make some decisions you may
    regret later when you’re drinking. They’re still your decisions, and you’re
    still accountable for them.
    “They go into the bedroom, and they engage in consensual sex, contrary
    to Mr. Cauble’s later claims, just sort of, ‘Oh, I must have been raped. I
    wasn’t raped. He tried to rape me.’ I’m not saying a man cannot be a victim
    of sexual assault, but there are very different things about a man and a
    woman and how they respond sexually and what you can do to somebody or
    how can you respond when you’re engaged in sex. Mr. Cauble’s semen is in
    [C.W.’s] mouth. Mr. Cauble had to be awake and aroused for that to have
    occurred.
    “[Defense counsel]: Objection. Your Honor, there is no evidence of
    that.
    “The Court: Overruled.
    “[Prosecutor]: Common sense. Now, when he is confronted with that,
    that may be how you would try to explain that. That is the truth. That is the
    truth. Not only is his semen in [C.W.’s] mouth, his semen is on [C.W.’s]
    penis, as well as on the non-sperm fraction. His DNA is there. [¶] All of that
    evidence supports a consensual sexual encounter, one that Mr. Cauble may
    later have regrets about. But nonetheless, that is what it was.”
    The prosecutor continued: “[R]emember, Detective Tefft talked about
    that and his experience back in the 70’s. Military men would get picked up.
    They would drink. They would engage in sex. They would wake up, feel
    ashamed, remorse, regret, and then assault the person that they had sex
    with, the male that they had sex with. That is what happened here.”
    Defense counsel did not contest that Cauble killed C.W. He told the
    jury that Cauble was drugged and acted in self-defense in the face of a rape
    17
    or attempted rape; that he feared great bodily harm and that Cauble’s blood
    on the towel corroborated his story. Counsel argued Cauble was taken
    advantage by C.W., characterizing C.W. as a rapist or “con man who drugs
    people that he finds on the street.” He emphasized Cauble’s story to his wife
    in the jail call, telling the jury it was important to remember “how she talked,
    how he talked, how they reacted” when he told her C.W. tried to rape him but
    he had no specific memory of it.
    In rebuttal, the prosecutor addressed Cauble’s claim he was drugged
    and acted in self-defense. She pointed out C.W. sustained no defensive
    wounds, stating he was killed while he was asleep. She argued: “Counsel
    didn’t even talk about the bedding. You know why? Because the only
    explanation for that is that [Cauble] stabbed through the sheets in a bed
    while [C.W.] was sleeping. It is why [defense counsel] doesn’t even touch it.
    There is no other reasonable explanation for that. It is why we brought that
    in. It is why those cuts are there.” She argued Cauble’s regret and remorse
    after sobering up was not provocation under the law. She pointed out no
    drugs were found in C.W.’s apartment, and argued against the theory that
    Cauble awoke from use of a date rape drug, suggesting Cauble made up the
    story because he was intoxicated then felt bad about his actions: “You drink
    too much. You regret you had it. Something must have been put in my
    drink. I never would have done that on my own. Or you drank too much.
    You drank, and you made bad choices. It happens to everyone. [¶] There is
    no evidence of that, no evidence of the drugs at the house. They looked
    through that place meticulously. . . . It wasn’t there, because it didn’t
    happen. [¶] The only way I ever would have came [sic] in someone’s mouth
    was if I was drugged. Physically, that is impossible. And, two, that is not
    true. That is a way for you to kind of explain or justify why that happened.”
    18
    The prosecutor argued the physical evidence showed Cauble was awake, then
    stated: “Again, I went through this again. There is no way he is unconscious
    when he ejaculates in [C.W.’s] mouth. . . . [¶] . . . [¶] When you look at all
    of the physical evidence and use your common sense, the only reasonable
    interpretation of the evidence is that Mr. Cauble, after he had sex,
    consensual sex with [C.W.], went to the kitchen, got that knife, and made
    sure [C.W.] could not tell about it. He stabbed him viciously and repeatedly.
    . . . That is murder.”
    Jury Notes and Verdict
    The jury commenced deliberations on a Friday morning. During
    deliberations, jurors submitted one question asking for the “full legal
    definitions of [first], second degree murder [and] voluntary manslaughter,
    beyond the judge’s instructions[.]” Jurors also asked to see the knife. The
    court directed the jury to the instructions given on murder, first degree
    murder and voluntary manslaughter, telling it in part there were no
    additional instructions beyond what it had given, and, “If you conclude a
    murder was committed it is murder of the second degree unless you find the
    defendant to have acted willfully, deliberately, and with premeditation.” The
    court explained that voluntary manslaughter is based on different theories
    where a killing occurs in a sudden quarrel or heat of passion, or the
    defendant acts in imperfect self-defense.
    The following Monday afternoon after about seven hours of
    deliberations, the jury returned its verdict. It acquitted Cauble of first degree
    murder and returned a verdict for second degree murder.
    Renewal of Motion to Dismiss for Precharging Delay
    Following trial, defense counsel renewed his motion to dismiss for
    prejudicial precharging delay. After considering the trial evidence and
    19
    parties’ arguments, the trial court in a lengthy ruling recounted the early
    investigation in 1979, the technology limitations and advances through the
    years, the potential suspects who were identified and eliminated, Cauble’s
    lies to investigators, and events leading up to the prison operation in which
    Cauble admitted to the killing. The court again found “absolutely no
    negligence” by police who were “not to be faulted for delaying a prosecution of
    somebody for . . . a crime such as murder until they are certain that they
    have sufficient evidence to convict.” The court continued: “Instead of being
    prejudiced by . . . the fact of the delay, the defendant was able to spend 40
    years out and about in Colorado, living his life, instead of spending it in the
    state prison in California. [¶] Was there any prejudice to the defendant by
    the loss of evidence? No. None whatsoever. [¶] There were no percipient
    witnesses to the crime. There were no percipient witnesses who saw Mr.
    Cauble leave with [C.W.] from Green’s bar or anywhere. There’s no credible
    evidence that any of those things existed. [¶] . . . There’s no evidence that
    there was any drugs that were present in connection with the house. None of
    that stuff was destroyed. It was all collected and it was recorded. If there
    was anything to be found in there, the evidence was all preserved. It was
    available for testing. [¶] There was no prejudice. The motion . . . to dismiss
    for the prearrest delay is denied.”
    New Trial Motion
    Cauble unsuccessfully moved for a new trial on grounds his trial
    attorney provided ineffective assistance in multiple ways. In part, he argued
    his counsel failed to object to improper testimony from various witnesses or
    present certain experts, advised Cauble not to testify by exaggerating the
    strength of impeaching testimony and underestimating the strength of the
    People’s case, did not present evidence to rebut the People’s claim that
    20
    Cauble had attacked a sleeping and defenseless C.W. because Cauble was
    upset about having sex with him, and did not adequately advocate during
    closing arguments that the People failed to meet their burden to prove
    beyond a reasonable doubt the absence of self-defense.
    The court denied the motion. It engaged in a lengthy analysis of the
    trial evidence as well as Cauble’s statements and ultimate confession, finding
    that once the DNA testing and fingerprint analysis came through “the
    evidence in this case was not close, not at all.” In part, the court stated how
    in its view the physical evidence belied Cauble’s claim of self-defense but that
    Cauble had presented the defense in any event by his recorded statement,
    leading it to conclude there was no reasonable probability the result of the
    proceeding would have been different absent any error on the part of his
    counsel.
    DISCUSSION
    I. Claim of Prejudicial Precharging Delay
    Cauble contends that 40 years of delay in charging him deprived him of
    his due process right to a fair trial. He maintains the delay resulted in the
    loss of “blockbuster” witnesses—cab company employees who interacted with
    him the morning of his death and one of C.W.’s former roommates— which
    maximized the prejudice to him. Cauble presented police interview reports
    taken on the day of C.W.’s death with statements from employees Dorothy
    Birse and Charlotte Davidson, who died respectively in 1995 and 2015, and
    taxi driver Mike Goldstein, who died in 1984. Birse related to officers that
    she was working a cashier stand and checked C.W. in at about 5:00 a.m.
    Birse “vividly” remembered it because C.W. paid the balance of his taxi lease
    with a single $100 bill, even though he had logged only one fare, and also told
    her he met a friend, saying, “You know how things like that go,” and “If you
    21
    can make more money by not working.” Davidson recounted that C.W. told
    her he had not worked that night and would not be joining her at their usual
    coffee shop, telling her, “I’ve got someone waiting for me at home.” Davidson
    told police that C.W. “said it like the cat that ate the canary.” Goldstein
    drove C.W. home and did not see anything unusual such as lights on at
    C.W.’s apartment or anybody standing on the porch. Cauble also presented a
    statement taken from John King, a former roommate of C.W.’s, who told
    police there were always male strangers coming in and out spending the
    night, and that it would be unusual for C.W. to leave someone in the house
    while he went back to work because he had some nice things. King died in
    2004.
    Cauble argues these witnesses gave consistent testimony supporting
    his story that C.W. drugged and robbed him; their statements would have
    permitted the jury to conclude that when C.W. left his apartment he had time
    to dispose of the drugs he used on a captured and unconscious Cauble.
    Cauble argues: “As a result, the jury lacked the strongest evidentiary basis
    to reject the prosecution’s theory that Cauble never lost consciousness.” He
    further argues the People’s delay was unreasonable given the napkin
    evidence and the fact that by 2011 investigators had confirmed his
    fingerprint and DNA matched samples collected from C.W. at the scene.
    According to Cauble, the substantial prejudice to him by the lost witnesses
    outweighed any justification for the delay, but the weakness of the People’s
    case against self-defense tipped the scales toward a due process violation.
    A. Legal Principles
    A defendant seeking to dismiss a charge for denial of the right to a fair
    trial and to due process of law under the state and federal Constitutions,
    “must demonstrate prejudice arising from the delay. The prosecution may
    22
    offer justification for the delay, and the court considering a motion to dismiss
    balances the harm to the defendant against the justification for the delay.”
    (People v. Nelson, 
    supra,
     43 Cal.4th at p. 1250.) Courts do not presume
    prejudice from precharging delay. (Ibid.; People v. Cordova (2015) 
    62 Cal.4th 104
    , 120; People v. Abel (2012) 
    53 Cal.4th 891
    , 908-909.) “To establish a due
    process violation, the defendant must prove the existence of actual harm,
    ‘such as by showing the loss of a material witness or other missing evidence,
    or fading memory caused by the lapse of time.’ [Citations.] ‘If the defendant
    establishes prejudice, the prosecution may offer justification for the delay; the
    court considering a motion to dismiss then balances the harm to the
    defendant against the justification for the delay. [Citation.]’ [Citation.] ‘The
    balancing task is a delicate one, “a minimal showing of prejudice may require
    dismissal if the proffered justification for delay is insubstantial.
    [Conversely], the more reasonable the delay, the more prejudice the defense
    would have to show to require dismissal.” [Citation.]’ [Citation.] At bottom,
    the court must ascertain whether the precharging delay tilted the playing
    field against the defendant in such a way that it prevented him from
    receiving a fair trial.” (People v. Booth (2016) 
    3 Cal.App.5th 1284
    , 1302-
    1303.)
    “When . . . there is both prejudice from, as well as justification for, the
    precharging delay that occurred, the question of whether the delay violated
    due process will often depend on the strength of the prosecution’s case.
    [Citation.] If the evidence of the defendant’s guilt is strong, the likelihood of
    consequential prejudice from the precharging delay is reduced and a longer
    delay will be tolerated, but if the evidence against the defendant is weak, the
    claimed prejudice will take on added significance and enhance the probability
    of an unfair trial.” (People v. Booth, supra, 3 Cal.App.5th at p. 1310.) “ ‘We
    23
    review for abuse of discretion a trial court’s ruling on a motion to dismiss for
    prejudicial prearrest delay [citation], and defer to any underlying factual
    findings if substantial evidence supports them [citation].’ ” (People v. Jones
    (2013) 
    57 Cal.4th 899
    , 922.)
    B. Prejudice
    In denying Cauble’s motion before trial, the trial court reasoned in part
    that while there were lost potential witnesses, “the significance or the
    substance of any of [those witnesses’] testimony is speculative as to whether
    or not it would be of any benefit at all to Mr. Cauble.” This conclusion was
    not an abuse of discretion. The import of the taxi employee witnesses was
    simply that C.W. had appeared in the early morning hours at the cab station
    to pay his lease with a $100 bill, and related in an idiomatic and mischievous
    way that he had a person waiting for him at his house. The statements are
    as consistent with Cauble being awake and voluntarily waiting for C.W. as
    any other scenario. And investigators found no drugs of any kind in C.W.’s
    apartment. The inferences that Cauble suggests a jury may draw from these
    employee statements and that of C.W.’s former roommate—that C.W. took
    the bill from Cauble’s wallet and Cauble had to be drugged and unconscious
    because C.W. would not otherwise leave a stranger in his house—are too
    tenuous to nonspeculatively or reasonably follow from this evidence. In
    short, the trial court’s finding was not “beyond the bounds of reason.” (People
    v. Fuiava (2012) 
    53 Cal.4th 622
    , 730.) Given the nature of the witness
    statements, we agree Cauble has not shown actual prejudice due to their
    absence. (Accord, People v. Cowan (2010) 
    50 Cal.4th 401
    , 431.)
    This distinguishes the circumstances here from those in People v.
    Booth, supra, 
    3 Cal.App.5th 1284
    , on which Cauble relies. In Booth, the
    defendant lost a “potentially powerful witness”—an eyewitness to a
    24
    shooting—who told police the defendant was not among the group of men
    who carried it out. (Id. at p. 1305.) Because the witness “had the potential to
    be a blockbuster witness for the defense,” the defendant was “substantially
    and materially prejudiced” by his absence at trial. (Id. at p. 1308.) Such is
    not the case here. None of the aforementioned witnesses were eyewitnesses
    to C.W.’s actual killing; they merely recounted what they observed about
    C.W. on the morning of his death, or in King’s case, offered an opinion about
    C.W.’s preferences concerning strangers at his house. Booth does not compel
    us to reach a different conclusion.
    C. Justification for the Delay and Balancing
    Even if we were to agree Cauble demonstrated some measure of
    prejudice from the passage of time due to the lost witnesses, we would
    conclude the trial court did not abuse its discretion when it found “there was
    strong justification” for the delay. Cauble’s counsel conceded below there was
    no showing the delay was designed to create a tactical advantage; Cauble
    does not contend on appeal that the delay in this case was purposeful, and
    there is no evidence to support such a conclusion. Rather, Cauble argues the
    delay was unreasonable in view of the napkin with his handwritten
    information found in 1979 at the scene as well as the discovery of Cauble’s
    fingerprints on items and DNA in C.W.’s mouth and on his penis, which
    investigators possessed in 2011 when they re-interviewed Cauble in
    Colorado. Cauble asserts no new evidence was collected between 2011 and
    2017, but in 2015, Davidson, who Cauble describes as the “single most
    important witness” to his defense, had died. Cauble argues we should
    increase scrutiny when law enforcement puts an ongoing investigation on the
    “ ‘ “back burner” ’ ” hoping it would someday become more prosecutable.
    25
    Here, the People presented ample evidence permitting the trial court to
    reasonably find substantial investigatory justification for the delay. The
    evidence showed that technology in 1979 prevented the easy identification of
    the 174 fingerprints found at the scene. The napkin with Cauble’s name was
    found along with numerous other pieces of paper with names and addresses,
    and did not by itself point to Cauble as the murder suspect. Further,
    investigators pursued other suspects, including Guizar, seen running from
    the scene on the day of C.W.’s murder, and who later had been charged and
    convicted of an unrelated murder. “[J]ustification for the delay is strong
    when there is ‘investigative delay, nothing else.’ ” (People v. Cowan, 
    supra,
    50 Cal.4th at p. 431.) Though Cauble’s fingerprints were finally identified in
    2009 and DNA from C.W.’s penile and buccal swabs pointed to Cauble
    making him in the court’s view a “good suspect,” that evidence pointed to
    Cauble and C.W. engaging in sex, which was unremarkable in view of one
    witness’s statement to police that C.W. had many overnight male visitors. In
    the face of Cauble’s denials in 2011 that he knew C.W. or was at the scene,
    the People held off charging him with murder until they were able to obtain
    Cauble’s admission during the jail operation. The trial court ultimately
    26
    found in denying the motion that the People were justified in waiting until
    they could obtain evidence actually connecting Cauble to C.W.’s killing.8
    This finding was not an abuse of discretion. “Sometimes a crime simply
    is not solved immediately but must await some break in the case . . . .”
    (People v. Cordova, supra, 62 Cal.4th at p. 120.) “The decision when to
    proceed with a prosecution is exclusively one for the executive branch of
    government. It can be a complex question and prosecutors have great
    discretion in deciding when and if to proceed.” (People v. Boysen (2007) 
    165 Cal.App.4th 761
    , 774.) “A court should not second-guess the prosecution’s
    decision regarding whether sufficient evidence exists to warrant bringing
    charges. ‘The due process clause does not permit courts to abort criminal
    8      The court explained: “In April 2009, the lab requested to have Mr.
    Cauble’s DNA compared to the glasses and the swabs, also to have the knife
    checked for prints and DNA. In May of 2009, the defendant’s DNA is
    included on the sperm fraction on the victim’s penile and mouth swabs. The
    DNA on the handle of the knife was insufficient, and the defendant was
    excluded from the bloodstain on the knife blade. [¶] So now we have Mr.
    Cauble with some fingerprints and DNA in [C.W.’s] apartment presumably
    near the time of the homicide, but more than one person certainly could have
    been in [C.W.’s] apartment. He’s a good suspect, and they have somebody
    that they’re focusing in on. [¶] But at least in Mr. Tefft’s mind, I think in the
    minds of the District Attorney, they didn’t have enough, not to prosecute
    somebody for a murder, not to prosecute somebody for a first degree murder
    or murder with potential special circumstances.” The court went on to point
    out there were numerous unaccounted for fingerprints in December of 2009
    with matches for persons who were not excluded as suspects; Cauble’s DNA
    was not found in 2011 tests of the bedspread, blanket, pillowcases, or dried
    blood scrapings from a night table; and Cauble continued to deny everything,
    claiming he might have been drugged but having no memory of that. The
    court stated that as of 2018, police were “convinced that they have the right
    suspect but they cannot tie him to the actual murder or they don’t know what
    the circumstances of the killing are.” It pointed out that it was not until the
    jail operation that Cauble admitted to stabbing the victim to the undercover
    officer and later in the jail call to his wife.
    27
    prosecutions simply because they disagree with a prosecutor’s judgment as to
    when to seek an indictment. . . . Prosecutors are under no duty to file
    charges as soon as probable cause exists but before they are satisfied they
    will be able to establish the suspect's guilt beyond a reasonable doubt . . . .’ ”
    (People v. Nelson, 
    supra,
     43 Cal.4th at p. 1256.) “It is not enough for a
    defendant to argue that if the prosecutorial agencies had made his or her case
    a higher priority or done things a bit differently they would have solved the
    case sooner.” (Id. at pp. 1256-1257.)
    We hold the trial court did not err by concluding People’s justification
    for the delay—the absence of evidence permitting a jury to find guilt beyond a
    reasonable doubt until Cauble’s jail admissions—well outweighed any
    minimal showing of prejudice Cauble made such that Cauble was not
    deprived of due process or a fair trial. Unlike People v. Booth, supra, 
    3 Cal.App.5th 1284
    , where the case against the defendant was not strong (id.
    at p. 1310), here, Cauble admitted to killing C.W.; the question was whether
    he acted in self-defense or under circumstances that would allow a conviction
    for a lesser offense such as voluntary manslaughter. Though the jury
    acquitted C.W. of first degree murder and convicted him of second degree
    murder, that circumstance in our view—particularly in view of the
    substantial justification for the delay—does not tip the scales toward the
    probability of an unfair trial and due process violation on precharging delay
    grounds. In sum, “ ‘[b]alancing the prejudice [Cauble] has demonstrated
    against the strong justification for the delay, we find no due process
    violation.’ ” (People v. Cordova, supra, 62 Cal.4th at p. 120.)
    28
    II. Motion for New Trial Based On Claim of Prejudicially Ineffective
    Assistance of Counsel
    Cauble contends the trial court erred by denying his motion for new
    trial based on his defense counsel’s constitutionally deficient trial
    representation following counsel’s wife’s placement into hospice care and
    death in December 2018. According to Cauble, counsel was ineffective in
    three ways: (1) he forgot to call a critical forensic expert or have her present
    in court during the People’s case in chief; (2) he failed to fulfill a critical
    promise he made during his opening statement, namely that Cauble would
    testify about what happened on the night in question; and (3) he failed to
    challenge assertedly improper and prejudicial lay opinions elicited from
    prosecution witnesses Tefft, Cornacchia and Oplinger. According to Cauble,
    given the weaknesses in the People’s case and its closeness as evidenced by
    the jury’s notes and second degree murder verdict, his counsel’s errors likely
    changed the outcome of the case.
    A. Legal Principles
    “[A] defendant may raise the issue of counsel’s ineffectiveness as a
    basis for a new trial, and, to expedite justice, a trial court should rule ‘[i]f the
    court is able to determine the effectiveness issue on such motion.’ [Citation.]
    To make out a claim that counsel rendered constitutionally ineffective
    assistance, ‘the defendant must first show counsel’s performance was
    deficient, in that it fell below an objective standard of reasonableness under
    prevailing professional norms. Second, the defendant must show resulting
    prejudice, i.e., a reasonable probability that, but for counsel’s deficient
    performance, the outcome of the proceeding would have been different.’
    [Citation.] To make out an ineffective assistance claim on the basis of the
    trial record, the defendant must show ‘(1) the record affirmatively discloses
    29
    counsel had no rational tactical purpose for the challenged act or omission,
    (2) counsel was asked for a reason and failed to provide one, or (3) there
    simply could be no satisfactory explanation. All other claims of ineffective
    assistance are more appropriately resolved in a habeas corpus proceeding.’ ”
    (People v. Hoyt (2020) 
    8 Cal.5th 892
    , 958; see also People v. Carrasco (2014)
    
    59 Cal.4th 924
    , 981.) We do not second guess trial counsel’s reasonable
    tactical decisions. (People v. Woodruff (2018) 
    5 Cal.5th 697
    , 762.)
    Though denial of a motion for new trial is ordinarily reviewed for abuse
    of discretion, when the motion is based on the allegation of ineffective
    assistance of counsel, we apply a different standard: “Whether counsel’s
    performance was deficient, and whether any deficiency prejudiced defendant,
    are mixed questions of law and fact subject to our independent review.” (In re
    Gay (2020) 
    8 Cal.5th 1059
    , 1073; accord, People v. Hamilton (2009) 
    45 Cal.4th 863
    , 923 [“The determination of whether a defendant received ineffective
    assistance of counsel is a legal one made by a reviewing court, not a factual
    one entrusted to a finder of fact”]; People v. Rodriguez (2019) 
    38 Cal.App.5th 971
    , 977; People v. Ogunmowo (2018) 
    23 Cal.App.5th 67
    , 76.)
    B. Counsel’s Failures Regarding Expert DiMeo
    In support of his new trial motion, Cauble presented evidence that his
    counsel had retained a forensic expert, Lisa Allyn DiMeo, to review physical
    evidence from the scene including C.W.’s bedding but that his counsel never
    30
    called her as a witness though she was prepared for and appeared for trial.9
    Cauble submitted DiMeo’s declaration. In it, DiMeo acknowledged the
    People’s theory that C.W. was stabbed while sleeping, but observed he was
    lying on his right side and stated that based on her review, C.W. could not
    have been on his right side when he sustained the neck wound and other
    injuries on the right side of his body. Her review of bloodstains were
    “indicative of movement and [C.W.] being in different locations on the bed
    while bleeding.” Further, DiMeo observed none of the investigative reports
    documented the orientation or relationship of the sheets and blanket; her
    personal examination of the bedding revealed “no relationship between
    locations and positions of the defects to indicate they were created
    simultaneously.” Using a digital microscope to inspect the cuts, she verified
    there was no blood associated with any of the defects, which would be present
    if C.W. were stabbed through the bedding. DiMeo also expressed her view
    that “[i]t is impossible to determine through bloodstain pattern analysis
    whether blood deposited at a scene is from a self- inflicted injury of the
    9      DiMeo averred in part: “[Defense counsel] requested I be in court on
    the morning of January 22, 2019. I believed this was to observe the
    testimony of key State witnesses. The jury and counsel emerged from the
    courtroom for the noon break. [Defense counsel] approached me and said,
    ‘[Y]ou’re on next.’ I was shocked that [he] failed to request my presence
    during the case in chief. I had no idea what had been stated by the witnesses
    and the scenarios that they had alleged with regard to the physical evidence.
    [Defense counsel] said the State rested on a high note for the Defense, and
    decided it would be best to not call me as a witness, and not let Mr. Cauble
    testify.” The People attack the credibility of DiMeo’s declaration. They point
    out that trial began on January 28, 2019, but even if DiMeo was mistaken on
    the dates, before the noon recess on January 31, 2019, defense counsel had
    already told the court that he had no other witnesses. We do not see the
    discrepancies, which could be clerical in part, as critical to the ineffective
    assistance claim.
    31
    accused” and that the presence of Cauble’s blood could possibly be from an
    initial assault by the victim or injuries Cauble sustained while defending
    himself. DiMeo averred that had she been present during the testimony of
    the People’s physical evidence witnesses, she would have been prepared to
    rebut the possible positions of C.W. relevant to his injuries and bloodstains,
    and relate how the defects in the bedding had no association to those injuries.
    Cauble contends his counsel’s compromised state resulted in two key
    mistakes: First, he failed to exchange DiMeo’s report on the bedding with the
    prosecutor, and second, he neglected to prepare DiMeo for trial by permitting
    her to sit in on the prosecutor’s case in chief. Cauble maintains his counsel’s
    failure to present DiMeo’s exculpatory testimony—which counsel possessed
    before trial—was deficient and prejudicial, as it “stripped [him] of the only
    rebuttal to the prosecution’s skewed presentation of the physical evidence.”
    In reply, Cauble emphasizes the gravamen of his claim is counsel’s failure to
    prepare DiMeo to the point where she was unable to testify and he
    “effectively forfeited [her] as a witness.”
    We agree counsel’s failure to take the proper steps to present DiMeo as
    a defense forensic expert cannot be explained as reasonable trial strategy.
    The reason for counsel’s decision not to call her, according to DiMeo, was his
    perception of the strength of Cauble’s jail call with his wife, in which Cauble
    admitted killing C.W., telling her C.W. lied to him, robbed and raped him.
    But DiMeo’s opinions would have bolstered Cauble’s defense apart from
    Cauble’s statements to his wife; they were relevant and probative on how the
    attack may have occurred as well as Cauble and C.W.’s positioning during it,
    contradicting Oplinger’s testimony and the People’s theory that the “only
    explanation” of the physical evidence was that Cauble stabbed a sleeping and
    defenseless C.W. through the sheets and blanket covering him. DiMeo would
    32
    have explained why the jury should reject criminalist Cornacchia’s guess that
    Cauble suffered a self-inflicted wound in his attack on C.W. The absence of
    DiMeo’s opinion permitted the prosecutor to use the cuts in the sheet and
    blanket to highlight in her closing argument without rebuttal the theory of a
    sleeping and defenseless C.W. This is not a situation where Cauble relies on
    speculation or merely surmises the content of DiMeo’s testimony, which was
    summarized in Cauble’s new trial motion. (People v. Lucas (1995) 
    12 Cal.4th 415
    , 448, fn. 5 [defendant claiming ineffective assistance based on the failure
    to call an expert witness “must do more than surmise that defense experts
    might have provided more favorable testimony”].)
    The People argue counsel’s failure to call expert DiMeo could have been
    a rational decision that her testimony would have hurt Cauble, not helped
    him. They maintain the jury could have inferred Cauble stabbed C.W.
    through the neck, cleaned the blade and waited for him to bleed out, then
    stabbed C.W. an additional 12 times to ensure his death. They also argue her
    testimony would have permitted the prosecutor to argue Cauble attempted to
    stab C.W. 20 or more times, making self-defense less likely. We disagree
    these tenuous theories would have been a reasonable basis to forego DiMeo’s
    testimony. We believe the testimony would have allowed competent counsel
    to argue the bloodless cuts in the blankets and sheets were evidence of wild
    and uncontrolled slashing, consistent with Cauble’s self-defense theory that
    he awoke to find himself being assaulted, and killed C.W. in self-defense.
    The People presented no evidence as to how the knife got into the bedroom,
    and the jury could just have plausibly concluded C.W. kept a knife there for
    his protection. As we explain more fully below, counsel’s failure, combined
    with other errors such as the prosecutor’s improper introduction of a
    scientific fact not in evidence, and counsel’s unfulfilled promise to the jury
    33
    that he would present Cauble as a witness in his defense to testify about
    events discussed below, prejudicially impacted his case.
    C. Counsel’s Failure to Move to Exclude or Object to Detective Tefft’s
    Testimony About Young Military Personnel
    Cauble contends his counsel was prejudicially ineffective for neglecting
    to move before trial to exclude Detective Tefft’s testimony concerning young
    military men who befriend and have sex with gay men, then assault them out
    of remorse or shame. He points out his counsel was aware in advance of trial
    of the detective’s conclusions, which Tefft had related in a search warrant
    affidavit produced in discovery.10 Relying on People v. Martinez (1992) 
    10 Cal.App.4th 1001
    , involving testimony from a highway patrol officer
    concerning the operation of automobile theft rings, Cauble maintains such
    profile evidence can distort the jury’s perception of mens rea.
    We agree Detective Tefft’s testimony about common characteristics of
    young military men was an improper profile. “A profile is a collection of
    conduct and characteristics commonly displayed by those who commit a
    certain crime.” (People v. Robbie (2001) 
    92 Cal.App.4th 1075
    , 1084.) It
    “ordinarily constitutes a set of circumstances—some innocuous—
    characteristic of certain crimes or criminals, said to comprise a typical
    pattern of behavior.” (People v. Prince (2007) 
    40 Cal.4th 1179
    , 1226.) Such
    testimony “compares the defendant’s behavior to the pattern or profile and
    concludes the defendant fits the profile.” (Ibid.) Profile evidence can be
    10     Detective Tefft’s affidavit read: “I have seen accounts in the media, as
    well as having investigated cases where gay men frequently pick up young
    military personnel. Many times the military personnel go along willingly, are
    duped, or in some cases are seduced. Many times there is extreme remorse
    after sexual acts occur, and the gay males frequently become victims of
    violent crimes.”
    34
    “inherently prejudicial” where it requires the jury to “accept an erroneous
    starting point in its consideration of the evidence”; namely that “criminals act
    in a certain way; the defendant acted that way; therefore, the defendant is a
    criminal.” (Robbie, at p. 1085.) But such evidence is not always excluded; it
    “is inadmissible ‘only if it is either irrelevant, lacks a foundation, or is more
    prejudicial than probative.’ ” (Prince, at p. 1226.) The evidence can be
    “ ‘insufficiently probative’ ” where “ ‘the conduct or matter that fits the profile
    is as consistent with innocence as guilt.’ ” (Ibid.) And in a close case where
    the issue of guilty knowledge or intent is dependent on circumstantial
    evidence, the improper admission of such testimony can be prejudicial.
    (Accord, People v. Martinez, supra, 10 Cal.App.4th at p. 1008.)
    The People maintain that the detective’s testimony was merely a
    description of his investigation, in which he related to Cauble a theory of
    what might have happened between the two men. They also argue counsel’s
    decision not to make a pretrial motion was a rational, tactical one, as
    testimony that military men are duped would have fit Cauble’s narrative that
    he was lied to and seduced into going home with C.W. The People further
    argue a pretrial motion would have been futile, as the trial court in denying
    Cauble a new trial stated its view that the motion would have been
    “fruitless.” The People assert the evidence was relevant and admissible on
    Cauble’s motive, suggesting any prejudicial effect was outweighed by its
    probative value.
    We conclude counsel’s failure to seek to exclude or at least object to the
    detective’s improper profile testimony, and later the prosecutor’s argument
    based upon it, cannot be explained by a reasonable tactical purpose or trial
    strategy. “[T]he clear thrust of the evidence was to establish that [Cauble]
    ‘fit’ a certain ‘profile.’ ” (People v. Martinez, supra, 10 Cal.App.4th at p. 1006.)
    35
    The damaging effect of such profile evidence—particularly where the
    prosecution’s case as to why Cauble killed C.W. was entirely circumstantial—
    is too great to make its admission a reasonable and tactical decision. Even if
    Detective Tefft’s testimony can be accurately characterized as merely
    recounting his investigation, here, the prosecutor used it as substantive
    evidence of Cauble’s guilt, telling the jury, “That is what happened here.” In
    this way, she linked the characteristics of the young military men to Cauble,
    and encouraged the jury to infer guilt solely on the fact Cauble engaged in
    behaviors or exhibited characteristics (being a young military man who
    befriended and had sex with a gay man but regretted it, all innocent
    behavior) that matched the profile. (Compare People v. Prince, 
    supra,
     40
    Cal.4th at p. 1226 [rejecting argument that testimony was profile evidence
    where it did not link the general characteristics to that of the defendant].)
    This inflammatory profile evidence lacked any meaningful probative value,
    and its use invited the jury to abdicate its role of assessing the evidence as
    well as impeded Cauble’s ability to mount a defense against such a charge.
    (Accord, People v. Robbie, supra, 92 Cal.App.4th at pp. 1085, 1088 [reliance
    on profile evidence unfair because “[t]he jury is improperly invited to
    conclude that, because the defendant manifested some characteristics, he
    committed a crime,” which was “highly prejudicial” to the defendant].) Even
    if counsel’s pretrial motion would have been unsuccessful in the trial court,
    we are of the view that counsel was ineffective for not objecting to the
    prosecutor’s improper use of it in closing.
    Under all of the circumstances and combined with counsel’s other
    errors, admission of this testimony unfairly prejudiced Cauble’s case. There
    was little if any physical evidence suggesting the reason why Cauble stabbed
    C.W.; the prosecutor’s case was built on exceedingly weak inferences from
    36
    clothing on the floor,11 fingerprints on glasses and liquor bottles, and the
    location of C.W.’s body. But the prosecutor’s use of Tefft’s profile allowed the
    jury to hinge their decision on Cauble fitting a pattern of behavior of youthful
    and lonely military men rather than the evidence on the issue of the
    justification or lack thereof for Cauble’s actions. The jury’s rejection of the
    People’s first degree murder theory and its focus on the degrees of murder
    permit us to conclude as a reasonable probability that Cauble would have had
    a different outcome had counsel performed competently in this regard.
    D. Counsel’s Failure to Comply with His Announcement that Cauble Would
    Testify About Events Surrounding C.W.’s Killing
    As summarized above, defense counsel in his opening statement to the
    jury made his case for Cauble by emphasizing and describing Cauble’s
    anticipated trial testimony about the night and morning in question, and
    later, his statements to detectives. He told them Cauble would testify he and
    C.W. fought, and Cauble stabbed C.W. “in a blackout or a partial blackout as
    a result of being roofied by [C.W.].” Counsel represented the evidence would
    show Cauble left with a “very fuzzy memory of what occurred” but that in the
    end Cauble had reasonable cause to be in fear of his life. He urged the jury to
    “listen very carefully” to what Cauble had to say. Counsel made Cauble’s
    testimony and credibility the focus of his case, which was that Cauble
    reasonably acted in self-defense.
    Once the prosecutor played the recording of Cauble’s telephone call
    with his wife, however, counsel plainly decided he should advise Cauble
    differently. Explaining he did not recall seeing the recording but admitting it
    11    There is no evidence as to the type of clothing found on the floor or
    whose clothing it was, other than that a pair of pants contained C.W.’s wallet.
    The sole inference that may be drawn is that the clothing belonged to C.W.
    37
    could have been disclosed and produced, he told the court it “chang[ed] the
    scenario” with respect to whether Cauble should testify.
    An unfulfilled opening statement promise about defense evidence does
    not constitute ineffective assistance of counsel per se. (People v. Burnett
    (2003) 
    110 Cal.App.4th 868
    , 885.) It can in some circumstances be a
    reasonable tactical decision. (People v. Stanley (2006) 
    39 Cal.4th 913
    , 955.)
    But it can also be a damaging failure sufficient to support a claim of prejudice
    (see Mann v. Ryan (9th Cir. 2016) 
    828 F.3d 1143
    , 1154; Saesee v. McDonald
    (9th Cir. 2013) 
    725 F.3d 1045
    , 1049-1050; People v. Corona (1978) 
    80 Cal.App.3d 684
    , 725-726 [deficient representation in part because counsel in
    opening committed to introducing a variety of evidence, including alibi by the
    defendant and expert testimony to rebut the prosecution’s case but did not,
    opening the door to the prosecutor’s legitimate comments about the failures]),
    particularly where no intervening circumstance justifies the failure to deliver
    on the promise. (Accord, Williams v. Woodford (E.D.Cal. 2012) 
    859 F.Supp.2d 1154
    , 1171-1173 [defense counsel ineffective in promising the jury that “key
    witnesses”—the defendant and two eyewitnesses—would testify and then
    failing to fulfill that promise]; Madigral v. Yates (C.D.Cal. 2009) 
    662 F.Supp.2d 1162
    , 1183-1184 [defense counsel’s performance deficient because
    his decision to renege on the promise that defendant would testify could not
    be “chalked up” to “unforeseeable events . . . that would warrant . . . changes
    in previously announced trial strategies” and there was no reasonable
    explanation to counsel’s failure to call his client to the stand]; United States
    v. Crawford (E.D.Cal. 2009) 
    680 F.Supp.2d 1177
    , 1197-1197 [“Failure to
    produce a witness promised in opening statement may constitute ineffective
    assistance of counsel, if the promise was sufficiently ‘specific and dramatic’
    and the evidence omitted would have been significant. . . . In contrast,
    38
    where the promise is more general in nature, and/or where the testimony to
    be provided would not be significant or was elicited through other means,
    courts may defer to counsel’s reasonable decision to change course”]; U.S. ex
    rel. Hampton v. Leibach (7th Cir. 2003) 
    347 F.3d 219
    , 259; Ouber v. Guarino
    (1st Cir. 2002) 
    293 F.3d 19
    , 29 [rejecting claim that counsel’s decision was a
    justified reaction to unfolding events]; Anderson v. Butler (1st Cir. 1988) 
    858 F.2d 16
    , 17 [“L]ittle is more damaging than to fail to produce important
    evidence that had been promised in an opening. This would seem
    particularly so here when the opening was only the day before, and the jurors
    had been asked on the voir dire as to their acceptance of psychiatric
    testimony. The promise was dramatic, and the indicated testimony strikingly
    significant”].)
    In Saesee, the Ninth Circuit explained why such unfulfilled promises
    can be so detrimental: “A juror’s impression is fragile. It is shaped by his
    confidence in counsel’s integrity. When counsel promises a witness will
    testify, the juror expects to hear the testimony. If the promised witness never
    takes the stand, the juror is left to wonder why. The juror will naturally
    speculate why the witness backed out, and whether the absence of that
    witness leaves a gaping hole in the defense theory. Having waited vigilantly
    for the promised testimony, counting on it to verify the defense theory, the
    juror may resolve his confusion through negative inferences. In addition to
    doubting the defense theory, the juror may also doubt the credibility of
    counsel. By failing to present promised testimony, counsel has broken ‘a pact
    between counsel and jury,’ in which the juror promises to keep an open mind
    in return for the counsel’s submission of proof. [Citation.] When counsel
    breaks that pact, he breaks also the jury’s trust in the client. Thus, in some
    cases—particularly cases where the promised witness was key to the defense
    39
    theory of the case and where the witness’s absence goes unexplained—a
    counsel’s broken promise to produce the witness may result in prejudice to
    the defendant.” (Saesee v. McDonald, supra, 725 F.3d at pp. 1049-1050; see
    also Williams v. Woodford, supra, 859 F.Supp.2d at pp. 1171-1173 [“[T]he
    promise that [the defendant] would testify and speak extensively about the
    circumstances of the case would have made it nearly impossible for the jurors
    to put out of their minds the fact that he did not testify. This compromised
    [the defendant’s] right to be presumed innocent and his right to remain
    silent. Such harm is inherently prejudicial”]; U.S. ex rel. Hampton v.
    Leibach, at p. 259 [“Promising a particular type of testimony creates an
    expectation in the mind of jurors, and when defense counsel without
    explanation fails to keep that promise, the jury may well infer that the
    testimony would have been adverse to his client and may also question the
    attorney’s credibility. In no sense does it serve the defendant’s interests”].)
    We recognize that Ninth Circuit and federal district court cases such as
    Ouber are not binding on us. (People v. Powell (2018) 
    6 Cal.5th 136
    , 152.)
    But unlike in Powell,12 these cases are instructive on Cauble’s ineffective
    assistance claim. U.S. ex rel Hampton v. Leibach, supra, 
    347 F.3d 219
    ,
    involved sexual assault and other crimes on concert attendees by a large
    group of gang members. No physical evidence tied the defendant to the
    attack; eyewitness testimony was the “linchpin” of the state’s case against the
    defendant. (Id. at pp. 249-250.) During his opening statement, defendant
    12     In People v. Powell, supra, 
    6 Cal.5th 136
    , the defendant in part relying
    on Ouber v. Guarino, supra, 
    293 F.3d 19
     claimed the prosecutor committed
    misconduct by making a false promise he would testify. (Id. at p. 151.)
    Powell found Ouber not binding precedent, but also not on point, as the
    defendant did not make a claim of ineffective assistance and his counsel did
    not belatedly change plans, but it was the defendant himself who chose not to
    testify. (Id. at p. 152.)
    40
    [Hampton’s] counsel told the jury, “ ‘Mr. Hampton will testify and tell you
    that he was at the concert. Mr. Hampton will tell you that he saw what
    happened but was not involved with it.’ ” (Id. at p. 257.) But counsel
    eventually decided not to call the defendant to the stand because he was
    worried the jury would think him guilty by association. (Id. at p. 258.)
    The Court of Appeal agreed counsel’s action deprived Hampton of
    effective assistance: “We may assume, without deciding, that it was
    reasonable for [counsel] to advise Hampton not to testify and not to present
    testimony from other witnesses about his lack of gang ties; such decisions are
    often motivated by strategic considerations that command deference from the
    judiciary. [Citations.] But [counsel] promised the jury that it would hear
    from Hampton and that it would also hear evidence that he had no gang
    involvement, and he reneged on his promises without explaining to the jury
    why he did so. Turnabouts of this sort may be justified when ‘unexpected
    developments . . . warrant . . . changes in previously announced trial
    strategies.’ [Citations.] However, when the failure to present the promised
    testimony cannot be chalked up to unforeseeable events, the attorney’s
    broken promise may be unreasonable, for ‘little is more damaging than to fail
    to produce important evidence that had been promised in an opening.’
    [Citations.] The damage can be particularly acute when it is the defendant
    himself whose testimony fails to materialize: [¶] [‘]When a jury is promised
    that it will hear the defendant’s story from the defendant’s own lips, and the
    defendant then reneges, common sense suggests that the course of trial may
    be profoundly altered. A broken promise of this magnitude taints both the
    lawyer who vouchsafed it and the client on whose behalf it was made.’ ” (U.S.
    ex rel Hampton v. Leibach, 
    supra,
     347 F.3d at p. 257.) Counsel’s “broken
    promises themselves supplied the jury with reason to believe that there was
    41
    no evidence contradicting the State’s case, and thus to doubt the validity of
    Hampton’s defense.” (Id. at p. 260.)13
    In Ouber v. Guarino, 
    supra,
     
    293 F.3d 19
    , the court reached a similar
    conclusion in a case where counsel told the jury in a third retrial the
    defendant would testify about what happened and that her testimony would
    be central to the case, but then advised the defendant against it. (Id. at p.
    27.) The Court of Appeals disagreed that counsel’s action was a reasonable
    strategic choice, as he had “structured the entire defense around the prospect
    of the petitioner’s testimony” which was not forthcoming. (Id. at p. 28.) The
    court found counsel’s “delayed reaction . . . sharply reminiscent of the
    situation in Anderson v. Butler[, supra, 
    858 F.2d 16
    ], in which we observed
    that even ‘if it was . . . wise [not to have the witness testify] because of the
    damaging collateral evidence, it was inexcusable to have given the matter so
    little thought at the outset as to have made the opening promise.’ ” (Id. at
    pp. 28-29.) It rejected the claim that counsel’s decision was a justified
    reaction to unfolding events, stating, “[N]othing occurred during the third
    trial that could have blindsided a reasonably competent attorney or justified
    a retreat from a promise previously made. . . . [T]he prosecution’s case in
    13    The court further explained the harm: “The jury was [led] to believe
    that Hampton had a story to tell that was diametrically opposed to that of his
    accusers; it was told, in essence, that there were two versions of what
    occurred and that it would have the opportunity to evaluate Hampton’s own
    credibility in choosing between those versions. In the end, however, the jury
    never heard a second version of what occurred—from Hampton or any other
    eyewitness; it heard only the State’s account of events. And in that context,
    Hampton’s unexplained failure to take the witness stand may well have
    conveyed to the jury the impression that in fact there was no alternate
    version of the events that took place, and that the inculpatory testimony of
    the prosecution’s witnesses was essentially correct.” (U.S. ex rel Hampton v.
    Leibach, 
    supra,
     347 F.3d at p. 258.)
    42
    chief did not differ significantly at the third trial; and the situation that
    confronted the attorney when he changed his mind about the [defendant’s
    testimony] was no different from the situation that existed at a comparable
    stage of the earlier trials.” (Id. at p. 29.) It concluded that “in the absence of
    unforeseeable events forcing a change in strategy, the sequence constituted
    an error in professional judgment.” (Id. at p. 27.)
    Whether a decision to forego promised testimony is constitutionally
    deficient representation is a fact-based determination that we assess on a
    case-by-case basis. (People v. Stanley, supra, 39 Cal.4th at p. 955.) We also
    acknowledge that while counsel is responsible for trial tactics, the decision
    whether to remain silent or testify is for the defendant after consultation
    with counsel. (People v. Carter (2005) 
    36 Cal.4th 1114
    , 1198.) Though when
    questioned Cauble told the court it was his decision to not testify, the record
    affirmatively shows it was counsel who decided at the close of the People’s
    case that circumstances had changed such that he advised against putting
    Cauble on the stand. Cauble’s jail call with his wife triggered counsel’s
    reaction. But the People played the jail call during the preliminary hearing
    and it should not have been a surprise to counsel. That counsel neglected to
    view the video recordings on the drive provided by the prosecutor was not
    excusable. “Making [promises that Cauble would testify about his actions in
    self-defense and differing statements to investigators] and then abandoning
    them for reasons that were apparent at the time the promises were made[]
    cannot be described as legitimate trial strategy.” (U.S. ex rel. Hampton v.
    Leibach, 
    supra,
     347 F.3d at p. 259.) Like in the above cases, we cannot say
    counsel’s last minute decision to advise Cauble to forego testifying in this
    case was a strategic choice or a plausible option. This was not a situation
    where counsel had no reason to anticipate Cauble changing his mind about
    43
    testifying. By the time counsel made his decision, the prosecutor had already
    presented evidence that Cauble repeatedly and falsely told investigators
    during his interviews that he did not know C.W. and denied being at C.W.’s
    apartment, and thus there was no potentially damaging cross-examination or
    other intervening event that would warrant counsel’s decision. (Compare
    People v. Burnett, supra, 110 Cal.App.4th at pp. 883-884 [counsel’s decision to
    not call defendant a reasonable tactical decision in light of extensive
    impeachment evidence that “would only have further antagonized the jurors
    and the trial court” had defendant testified]; see also id. at p. 885 [defense
    counsel discovered that defendant lied to him, and “[o]nce the trial court
    ruled that defendant’s credibility could be impeached with even more
    damaging evidence, there was little point in engaging in a credibility duel
    which could only disadvantage defendant with the trial court”]; People v. Frye
    (1998) 
    18 Cal.4th 894
    , 983-984 [where defense counsel during trial “perceived
    defendant was having difficulty remembering information” he was not
    constitutionally ineffective despite opening statement promising defendant’s
    testimony].)
    There is little more important testimony to self-defense than the
    defendant’s own. Under the circumstances, Cauble’s testimony was critical to
    his claim of self-defense and could have changed the outcome of the case.
    Cauble was the sole person able to relate his interactions with C.W., his state
    of mind, C.W.’s actions, and his reaction to C.W.’s conduct or advances, on the
    night in question. Such detail was lacking from his statements to the
    undercover officer and his wife in the jail call. Defense counsel emphasized
    this to the jury in his opening statement, and Cauble’s testimony about his
    perceptions of the need to defend himself, if reasonable, would have been “ ‘a
    complete justification’ ” for his action. (People v. Beck and Cruz (2019) 8
    
    44 Cal.5th 548
    , 648; see also People v. Sotelo-Urena (2016) 
    4 Cal.App.5th 732
    ,
    744 [summarizing law of self-defense and imperfect self-defense].) The
    testimony would permit a finding that Cauble actually and reasonably
    believed he needed to use lethal force to defend himself. (Sotelo-Urena, at
    p.744.) The jury was also instructed with theories of voluntary manslaughter
    based on sudden quarrel, heat of passion, or imperfect self-defense, all
    theories turning on Cauble’s and C.W.’s exchanges and the subjective
    existence and objective reasonableness of Cauble’s belief in the need to
    defend. (Ibid. [imperfect self-defense applies when the defendant has an
    actual, but unreasonable, belief in the need for self-defense and only when
    the defendant fears imminent danger of death or great bodily injury].) Thus,
    Cauble’s testimony would have been powerful evidence on the question of
    malice, which is absent when a defendant sincerely but unreasonably
    believes in a need to defend himself from the person he tries to kill, or acts in
    the heat of a passion resulting from provocation he reasonably attributes to
    the victim. (People v. Rios (2000) 
    23 Cal.4th 450
    , 460; Sotelo-Urena, at p. 744
    [If the jury finds a defendant actually but unreasonably believed he needed to
    use lethal force, then he lacks the malice required for murder and is guilty
    only of voluntary manslaughter].) In short, we see no rational tactical
    purpose for counsel’s decision.
    We turn to the question of prejudice. This analysis does not entail the
    application of “ ‘mechanical rules.’ ” (In re Gay, supra, 8 Cal.5th at p. 1087.)
    Rather, we focus on the “ ‘fundamental fairness of the proceeding whose
    result is being challenged,’ ” asking “ ‘whether, despite the strong
    presumption of reliability, the result of the particular proceeding is
    unreliable because of a breakdown in the adversarial process that our system
    counts on to produce just results.’ ” (Ibid.) Cauble must demonstrate a
    45
    reasonable probability that but for his counsel’s deficient performance, the
    outcome of the proceeding would have been different. (People v. Mickel (2016)
    
    2 Cal.5th 181
    , 198.)
    Such a reasonable probability has been shown here. The jury trial was
    not lengthy; counsel made opening statements on a Tuesday morning, and
    the People rested two days later after the noon recess, a relatively short
    period of time making it unlikely the jurors forgot the promise. (See
    Anderson v. Butler, supra, 858 F.2d at pp. 17, 19 [considering among other
    things the fact only one day elapsed between the promise and the end of the
    defendant’s case].) The jury’s question shows it was focused on the degrees of
    murder. It then rejected the People’s theory of first degree murder, and was
    left to choose between second degree murder, voluntary manslaughter under
    various theories, or acquittal for reasonable self-defense. Cauble’s subjective
    belief in the need to defend himself was critical. Jurors were instructed it
    was the People’s burden to prove beyond a reasonable doubt that C.W.’s
    killing was not justified; that Cauble did not act in self-defense.
    And as we have explained, the People’s evidence on the reason why
    Cauble killed C.W. was exceedingly weak. Had Cauble testified he was
    incapacitated but realized at some point that C.W. had either raped or was
    attempting to rape him, the jury would have had a viable basis to find Cauble
    acted in reasonable or unreasonable self-defense or find “provocation”
    sufficient to support a voluntary manslaughter conviction. (E.g., People v.
    Trinh (2014) 
    59 Cal.4th 216
    , 233 [“[T]o reduce murder to manslaughter,
    provocation must be such as would ‘render an ordinary person of average
    disposition “liable to act rashly or without due deliberation and reflection,
    and from this passion rather than from judgment;” ’ ” heat of passion defense
    “must arise from provocation supplied, or reasonably believed to have been
    46
    supplied, by the victim or victims”]; People v. Lee (1999) 
    20 Cal.4th 47
    , 59
    [same]; People v. Millbrook (2014) 
    222 Cal.App.4th 1122
    , 1139 [“ ‘No specific
    type of provocation is required, and “the passion aroused need not be anger or
    rage, but can be any ‘ “ ‘[v]iolent, intense, high-wrought or enthusiastic
    emotion’ ” ’ ” ’ ” other than revenge, including fear].) If counsel had presented
    Cauble and expert DiMeo to counter the People’s case, a lawful conviction of
    voluntary manslaughter was a realistic possibility.
    It is true that the jury here received, and is normally presumed to
    follow, an instruction to “not consider, for any reason at all, the fact that the
    defendant did not testify.” But such instruction does not overcome the
    combined prejudice resulting from counsel’s omissions and failure to produce
    what would have been powerful evidence in support of Cauble’s defense.
    Under all of the circumstances, Cauble has shown confidence in the outcome
    of his trial has been undermined, and we conclude he has raised a reasonable
    probability that counsel’s unprofessional omissions “ ‘undermined the proper
    functioning of the adversarial process . . . .’ ” (In re Valdez (2010) 
    49 Cal.4th 715
    , 729.) We cannot say that the trial can be “relied on as having produced
    a just result.” (Ibid.)
    III. Claim of Prosecutorial Misconduct
    Cauble contends the prosecutor committed misconduct in closing and
    rebuttal arguments by referring to a false scientific fact not in evidence when
    responding to Cauble’s claim he was raped while unconscious, namely, that
    for Cauble’s semen to be found in C.W.’s mouth, Cauble had to be “awake and
    aroused” or that it was physically impossible for a person to be drugged and
    also ejaculate. Cauble maintains the misconduct was especially prejudicial
    where it was essentially undisputed at trial that Cauble had ejaculated into
    C.W.’s mouth. Thus, Cauble argues, “any juror who accepted the false
    47
    premise that a man must be awake and conscious to ejaculate necessarily
    would have rejected the defense’s contention that Cauble was raped while
    drugged and unconscious.” According to Cauble, the prosecutor’s false
    premise stripped him of his sole defense theory, rendering the misconduct not
    harmless beyond a reasonable doubt or at a minimum creating a reasonable
    chance that at least one juror accepted the premise.
    The People respond that Cauble forfeited any challenge to the
    prosecutor’s rebuttal remarks by not objecting to them or requesting an
    admonition. They argue the prosecutor’s rebuttal remarks about physical
    impossibility were not the same as the closing argument statement that
    Cauble had to be awake (to which Cauble’s counsel objected), and thus a
    second objection would not have been futile, as Cauble maintains. On the
    merits, the People argue the prosecutor had wide latitude to draw inferences
    from the evidence and matters of common knowledge; that her remarks in
    context merely stated her view based on all the evidence—the cigarettes
    Cauble smoked, the items he touched, his differing accounts to police, and
    “common knowledge about male physiology”—that Cauble was awake and
    aroused when he ejaculated. They argue even if erroneous, given the
    combination of jury instructions about statements of counsel and the strong
    evidence of Cauble’s guilt, it is not reasonably probable a result more
    favorable to him would have been reached in the absence of the prosecutor’s
    arguments.
    We reject the People’s forfeiture argument. The prosecutor’s remarks
    in rebuttal regarding the physical impossibility of a man ejaculating while
    unconscious were not so different from her initial closing statement as to
    require a continued objection, which given the court’s immediate unfavorable
    ruling would have been futile in any event. (Accord, People v. Mendoza
    48
    (2016) 
    62 Cal.4th 856
    , 906 [failure to request admonition to prosecutor’s
    assertion of fact not in evidence excused because the objection was “quickly
    overruled”].)
    It is generally improper for a prosecutor to misstate the evidence
    presented at trial, assert facts not in evidence, or base argument on facts not
    in evidence during closing arguments. (People v. Fayed (2020) 
    9 Cal.5th 147
    ,
    204; People v. Mendoza, supra, 62 Cal.4th at p. 906; People v. Linton (2013)
    
    56 Cal.4th 1146
    , 1205-1207.) “Referring to facts not in evidence is ‘clearly’
    misconduct ‘because such statements “tend[ ] to make the prosecutor [her]
    own witness—offering unsworn testimony not subject to cross-examination.
    It has been recognized that such testimony, ‘although worthless as a matter
    of law, can be “dynamite” to the jury because of the special regard the jury
    has for the prosecutor, thereby effectively circumventing the rules of
    evidence.’ [Citations.]” [Citations.] “Statements of supposed facts not in
    evidence . . . are a highly prejudicial form of misconduct, and a frequent basis
    for reversal.” ’ [Citation.] We ‘view the statements in the context of the
    argument as a whole.’ ” (People v. Rodriguez (2020) 
    9 Cal.5th 474
    , 480.)
    We cannot agree with the People that the prosecutor’s statements—
    which were not isolated—were a matter of common knowledge or common
    experience. Whether it is possible for a man to ejaculate while unconscious or
    semi-conscious is a scientific fact not within the ambit of a lay person.
    (Compare, People v. Young (2019) 
    7 Cal.5th 905
    , 933 [not misconduct to argue
    victims were “very fearful” before they were shot, as evidence showed they lay
    face down on the ground with their hands behind their heads with barrel of
    gun pressed against their heads when shots were fired; victims’ fear was a
    logical inference]; People v. Caro (2019) 
    7 Cal.5th 463
    , 513 [prosecutor’s
    references to how women react to a difficult relationship or failed marriage
    49
    was not misconduct as they drew on “ ‘ “common knowledge” ’or ‘ “common
    experiences” ’ ”]; People v. Mendoza, supra, 62 Cal.4th at p. 908 [not
    misconduct for prosecutor to make the “commonsense point” that no one who
    intentionally kills in a domestic setting is in a normal or calm state of mind].)
    Nor were the remarks a fair comment on or inference from the evidence,
    which would be within the bounds of permissible comment. (People v. Lucas,
    
    supra,
     12 Cal.4th at p. 473.)
    “ ‘ “A defendant’s conviction will not be reversed for prosecutorial
    misconduct, however, unless it is reasonably probable that a result
    more favorable to the defendant would have been reached without the
    misconduct.” ’ ” (People v. Young, supra, 7 Cal.5th at pp. 932-933; accord,
    People v. Tully (2012) 
    54 Cal.4th 952
    , 1010.) On this record, and in view of
    defense counsel’s failures recounted above, the improper remarks contribute
    to a circumstance making it reasonably probable a jury would have reached a
    result more favorable absent the prosecutor’s objectionable behavior. (Cal.
    Const., art. VI, § 13.) The prosecutor’s improper remark cut to the heart of
    the case: Had Cauble been awake and engaged in consensual sex with C.W.
    who he killed out of regret? Or was Cauble unconscious or semi-conscious,
    and awoke to find himself being assaulted by C.W.? Even if the court’s
    instructions could cure the prosecutor’s impropriety, we remain concerned
    with the cumulative impact of the errors in this case.
    The People suggest the physical evidence is overwhelming in that it is
    undisputed Cauble stabbed C.W. 12 times and lied about it. But the fact
    Cauble killed C.W. was not at issue, the disputed issue was the reason for
    Cauble’s action. The physical evidence was not strong on that point; it was
    limited to Cauble’s fingerprints on glasses and cigarettes and clothing on the
    floor, from which the prosecutor argued the men engaged in an entirely
    50
    consensual sexual encounter. The evidence in support of Cauble’s defense
    was limited to Cauble’s statements to the undercover officer and his wife,
    which did not relate the details of events or fully explain his and C.W.’s
    specific actions and Cauble’s reaction. And both Detective Tefft’s and the
    prosecutor’s improper statements bolstered the People’s theory that Cauble
    consciously engaged in consensual sex then killed a sleeping C.W. out of
    regret, directly undermining Cauble’s story that he awoke or regained enough
    consciousness to realize C.W. was raping or about to rape him. The absence
    of Cauble’s testimony about his perceptions and C.W.’s actions that evening
    or DiMeo’s evidence-based opinions rebutting the prosecutor’s mere argument
    that C.W. was asleep covered in bedding while Cauble stabbed him, compels
    us to reverse the judgment so as to ensure Cauble is afforded due process.
    Given our conclusions, we need not address Cauble’s remaining
    arguments.
    51
    DISPOSITION
    The judgment is reversed. The matter is remanded to the trial court
    for a new trial.
    O’ROURKE, J.
    WE CONCUR:
    McCONNELL, P. J.
    DATO, J.
    52