State v. DeMarco ( 2014 )


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    STATE v. DEMARCO—DISSENT
    PALMER, J., with whom ROGERS, C. J., and ZAREL-
    LA, J., join, dissenting. Under the emergency exception
    to the warrant requirement of the fourth amendment,
    the police may enter a dwelling without a warrant if
    they reasonably believe that an occupant is seriously
    injured or otherwise in immediate danger.1 The present
    case implicates the commonsense requirement that, to
    meet this objective standard, before entering a dwelling
    to save or rescue an occupant, the police must take all
    reasonable measures, consistent with the exigencies of
    the situation, to ascertain whether a true emergency
    exists. Accordingly, if, in light of those exigencies, it is
    feasible for the police to attempt to contact the person
    whose safety is the subject of concern in order to deter-
    mine whether that person actually is in the dwelling
    and, if so, in need of immediate aid, the police must
    make such an effort, and their failure to do so will
    render the search unlawful as incompatible with the
    reasonableness requirement of the fourth amendment
    to the United States constitution.2 As the Appellate
    Court correctly concluded, that is exactly what hap-
    pened in the present case: the undisputed evidence
    that the state itself adduced at the suppression hearing
    conclusively established that the police, in particular,
    Officer Tilford Cobb, had ready access to the cell phone
    number of the defendant, Michael Angelo DeMarco,
    which, as Cobb well knew, was contained in the defen-
    dant’s file at the police department. See State v.
    DeMarco, 
    124 Conn. App. 438
    , 447–48 and n.5, 
    5 A.3d 527
    (2010). Furthermore, that uncontested evidence
    demonstrated beyond a doubt that Cobb and his col-
    leagues had more than ample opportunity to retrieve
    and call that number during the nearly one hour period
    that transpired from the time Cobb, followed by other
    officers, arrived at the defendant’s home until the time
    they ultimately entered it. See 
    id., 449. Finally,
    it also
    is undisputed that moments after the police concluded
    their search of the defendant’s residence, they con-
    tacted the defendant on his cell phone, and he returned
    home immediately. Even though the state offered no
    reason or justification for the failure of the police to call
    the defendant in an effort to ascertain his whereabouts
    before searching his home for him, the trial court denied
    the defendant’s motion to suppress, concluding that the
    state’s evidence supported the inference, first, that the
    defendant’s cell phone number was ‘‘not available’’ to
    the police—and, in particular, to Sergeant Thomas Bar-
    cello, the officer at the scene who, in consultation with
    Cobb and Patrol Officer Will Mercado, made the deci-
    sion to enter the defendant’s home—and, second, that,
    in any event, it was not necessary for the police to
    attempt to contact the defendant due to ‘‘the immediacy
    of the situation.’’
    Because these findings are belied by the unchallenged
    testimony of the state’s own witnesses, the Appellate
    Court, after conducting a thorough analysis of the trial
    court record in accord with well established principles
    of appellate review, properly concluded that the find-
    ings were clearly erroneous and, therefore, not sustain-
    able on appeal. See State v. 
    DeMarco, supra
    , 124 Conn.
    App. 448–50. Consequently, contrary to the determina-
    tion of the majority—which refuses to apply the collec-
    tive knowledge doctrine3 and, instead, ignores the
    undisputed fact that Cobb easily could have contacted
    the defendant on his cell phone, thereby obviating any
    possible need to enter the defendant’s home without a
    warrant—the state’s claim under the emergency excep-
    tion must be rejected because the police failed to take
    the steps necessary to establish the existence of a true
    emergency.4 I therefore dissent.
    I
    FACTS
    The majority recites the limited facts found by the
    trial court but omits most of the highly relevant, undis-
    puted testimony, adduced by the state itself from the
    responding officers, that this court must consider in
    determining whether the trial court’s findings are sup-
    ported by the evidence. That uncontroverted testimony
    may be summarized as follows. On October 21, 2007,
    Cobb and his partner, Officer Jean Louis, were on patrol
    in the city of Stamford (city) when they decided to
    conduct an impromptu inspection of the defendant’s
    home. Ten days earlier, in response to complaints about
    a horrible odor emanating from the defendant’s home,
    Cobb had left a notice on the windshield of one of the
    defendant’s vehicles asking him to contact the city’s
    Animal Care and Control Shelter (animal control). Cobb
    could not recall, however, whether he had indicated on
    the form, by checking one of several boxes—licensing,
    complaints, vaccinations, and the like—what his visit
    had been about. Cobb also testified that the defendant’s
    neighbors always were complaining about the horrible
    smell coming from the defendant’s house. According
    to Cobb, the defendant complied with animal control
    on some matters but not on others, and ‘‘usually’’
    responded to notices that were left at his house
    requesting that he call animal control. Because the
    defendant had not responded to the last notice, Cobb
    decided to conduct an unannounced follow-up visit on
    October 21, 2007. Unaware that Cobb would be visiting,
    the defendant had left his house earlier that morning
    to go to a local beach.
    As the Appellate Court explained, ‘‘the record reveals
    that considerable time passed between Cobb’s initial
    arrival at the scene and the warrantless entry by the
    fire department. Cobb testified that he had been at the
    defendant’s home for several minutes when he decided
    that something might be wrong inside the home and
    called the police dispatch number. Notably, Cobb did
    not call the emergency number. The dispatcher told
    Cobb that he would contact the sergeant who was on
    duty, and, within one-half hour, Barcello arrived at the
    defendant’s residence. After Barcello spoke with Cobb,
    he went to the front door, walked around the exterior
    of the premises and attempted to look in the windows.
    ‘‘At some point during Barcello’s initial examination
    of the premises, Officer Mercado arrived, after being
    dispatched to assist Barcello. Mercado testified that he
    checked the front and back of the house and attempted
    to look in the windows. Mercado also testified that he
    spoke with Barcello and that they decided to call the
    [Stamford Fire Department (fire department)]. Bar-
    cello, whose testimony the [trial] court specifically
    credited, testified that between fifteen and twenty
    minutes [had] elapsed [from the time he arrived at the
    defendant’s residence until he summoned the fire
    department]. When [the fire department arrived, the]
    firefighters put on their breathing apparatus and
    entered the dwelling.’’ State v. 
    DeMarco, supra
    , 
    124 Conn. App. 449
    .
    With respect to whether the defendant’s cell phone
    number was available to Barcello during that time,
    ‘‘Cobb testified that animal control possessed the defen-
    dant’s cell phone number . . . . He also testified that
    he did not bring the number with him on the day of
    the warrantless entry but that the number was at the
    animal control office and that there were other animal
    control employees in the office on the date in question.’’
    (Footnote omitted.) 
    Id., 447–48. When
    Cobb was asked
    why he did not call the defendant if he had been con-
    cerned about his welfare, he responded that he did
    not call the defendant because he did not have the
    defendant’s cell phone number with him and that his
    primary concern was for the animals inside the defen-
    dant’s home.5 Cobb further testified that, after calling
    police dispatch, while waiting approximately thirty
    minutes for Barcello to arrive, he called Laurie Holly-
    wood, his supervisor at animal control, and asked her
    to come to the scene to assist him in the seizure of
    the defendant’s dogs, which she did. Cobb did not ask
    Hollywood to call the defendant, however, nor did he
    ask her to bring the defendant’s cell phone number with
    her when she came.
    When asked whether Barcello was aware prior to the
    search of the defendant’s home that animal control had
    the defendant’s contact information, Cobb responded
    that he believed Barcello was aware of this fact. Bar-
    cello’s testimony, however, was somewhat vague and
    often conflicting as to when he actually obtained the
    defendant’s cell phone number. Although he testified
    that he may have obtained the number prior to entering
    the defendant’s home, he also stated that he never asked
    anyone for the defendant’s cell phone number prior to
    entering the home, and that he did not know whether
    anyone actually had tried to call the defendant. He con-
    ceded, however, that, as soon as the search concluded,
    one of the officers at the scene called the defendant
    on his cell phone and asked him to return home. Mer-
    cado, the officer who placed that call, testified that
    Barcello handed him the number after the search and
    told him to call the defendant. The defendant, who
    was approximately ten minutes away when he received
    Mercado’s call, returned home immediately and was
    placed under arrest.
    With respect to whether the immediacy of the situa-
    tion prevented Barcello or any of the other officers
    from calling the defendant prior to entry, none of the
    officers testified that it would have been impracticable
    or difficult to do so. According to Mercado, the issue
    simply never was discussed. Indeed, although Barcello
    was the supervising officer, he testified that he did not
    know whether anyone had tried to call the defendant.
    Nevertheless, according to Barcello, he and the other
    officers at the scene conducted an investigation into
    the defendant’s whereabouts prior to searching the
    defendant’s home. With the exception of asking one
    of the defendant’s neighbors whether he had seen the
    defendant ‘‘recently,’’ however, Barcello could not iden-
    tify any investigative efforts that he or the other officers
    had undertaken to ascertain the whereabouts of the
    defendant.6 For example, it does not appear that he
    asked the defendant’s neighbors how many cars the
    defendant owned and whether any of them were miss-
    ing, whether they had seen the defendant in the ten
    days since Cobb had left the last notice, whether the
    defendant’s house smelled any different than it usually
    smelled, or whether the accumulation of mail in the
    defendant’s mailbox was unusual. In fact, while Cobb,
    Barcello and Mercado all cited the overflowing mailbox
    as one of the reasons why they thought the defendant
    might be in peril, there is nothing in the record to indi-
    cate that any of them examined the mail to determine
    how long it had been there.7
    Finally, the undisputed evidence established that the
    conditions that the officers encountered at the defen-
    dant’s home—barking dogs, horrible odor, multiple
    vehicles and unkempt premises—were not at all
    unusual for the defendant’s residence, and the officers
    knew it. As the Appellate Court explained, ‘‘the uncon-
    troverted evidence established that the police were
    aware on the day of their warrantless entry that the
    defendant’s home was consistently in a state of disre-
    pair and always had multiple cars parked on the prem-
    ises, both in the driveway and on the front lawn.’’ State
    v. 
    DeMarco, supra
    , 
    124 Conn. App. 456
    –57 n.11. Further-
    more, both Cobb and Hollywood testified that they were
    aware that the defendant owned several vehicles, and,
    according to Mercado and Barcello, there were only
    two vehicles parked in front of the house when they
    arrived. As for the odor and the barking dogs, Cobb
    testified that the defendant’s neighbors ‘‘were always
    complaining’’ about ‘‘a horrible smell coming from
    the house.’’
    II
    APPELLATE COURT DECISION
    The Appellate Court concluded that the trial court’s
    finding that the defendant’s cell phone number was not
    available to Barcello was clearly erroneous in light of
    Cobb’s uncontested testimony that animal control,
    which is a division of the Stamford Police Department,
    had the defendant’s cell phone number. See State v.
    
    DeMarco, supra
    , 
    124 Conn. App. 447
    and n.5. The Appel-
    late Court reasoned that, although Barcello did not
    physically possess the defendant’s number when he
    arrived at the defendant’s residence, the only reason-
    able inference was ‘‘that Cobb could have readily
    obtained [it] by calling the animal control office.’’8 
    Id., 448. In
    reaching its determination, the Appellate Court
    relied on the collective knowledge doctrine, pursuant
    to which a court considers the knowledge of all of
    the investigating officers, and not merely the personal
    knowledge of any single officer, in assessing the reason-
    ableness of a warrantless search or seizure, if it is rea-
    sonable to do so. See 
    id. In the
    view of the Appellate
    Court, therefore, because Cobb would have been
    expected either to obtain the defendant’s cell phone
    number and to call the defendant himself, or to provide
    Barcello with that number, the police did not act reason-
    ably in entering the defendant’s residence without first
    trying to contact him. See 
    id., 448–50. The
    Appellate Court further concluded that the trial
    court’s finding that the immediacy of the situation pre-
    vented Barcello from obtaining the number ‘‘was also
    clearly erroneous and [was] contradicted by the uncon-
    tested police testimony relating to the length of time
    that was spent at the [defendant’s] residence before
    any authorities entered the dwelling.’’ 
    Id., 448. Specifi-
    cally, the Appellate Court stated: ‘‘[T]he record clearly
    demonstrates that the authorities were at the defen-
    dant’s home for nearly one hour prior to entering the
    dwelling. . . . [The events that took place during that
    time belie] any claim of emergency or imminent danger
    and the attendant implication that the police did not
    have adequate time to attempt to contact the defendant
    . . . before their warrantless entry of his home.’’ 
    Id., 453–54. The
    Appellate Court also observed that there
    were additional, uncontested facts in the record that
    bolstered the conclusion that an objectively reasonable
    officer would not have believed that the defendant’s
    life was in immediate danger. Specifically, the Appellate
    Court concluded that ‘‘[t]he [trial] court’s memorandum
    of decision properly sets forth many of the facts that
    were available to the police [when] they were deciding
    to make a warrantless entry into the defendant’s home.
    . . . [T]hey include the terrible odor, the overflowing
    mailbox and so forth. The [trial] court, however, only
    [set] forth the facts that tend[ed] to support the conclu-
    sion that an emergency situation [had] existed. There
    was, however, additional uncontroverted and unchal-
    lenged evidence presented at the suppression hearing
    that the court wholly disregarded in its findings.’’ 
    Id., 455. The
    Appellate Court then summarized that evidence,
    which included that ‘‘Cobb and [Hollywood, Cobb’s]
    supervisor . . . both testified without challenge that,
    over a period of years, the defendant’s neighbors had
    often complained of the ‘horrible smell coming from
    the house,’ as well as dogs barking and roaming.’’ 
    Id., 455–56. The
    Appellate Court further observed that,
    although the trial court had relied on the number of
    vehicles in the defendant’s front yard in concluding that
    it was reasonable for the officers to believe that the
    defendant was home, ‘‘the uncontroverted evidence
    [adduced at the suppression hearing] established that
    the police were aware on the day of their warrantless
    entry that the defendant’s home was consistently in a
    state of disrepair and always had multiple cars parked
    on the premises, both in the driveway and on the front
    lawn.’’ 
    Id., 456–57 n.11.
    Specifically, the Appellate Court
    observed that Hollywood had testified, ‘‘without chal-
    lenge, that she had been to the defendant’s home three
    or four times, that she knew that he lived alone, that
    he owned three motor vehicles and a boat and that the
    property was generally in a state of disrepair.’’ 
    Id., 456. III
                     MAJORITY OPINION
    The majority commences its analysis by setting forth
    the proper standard of review ‘‘for deciding whether
    [a] trial court properly denied a defendant’s motion to
    suppress on the ground that the search violated the
    fourth amendment to the United States constitution.’’
    As the majority states, when a defendant seeking to
    suppress evidence does not dispute the credibility or
    accuracy of the testimony of the state’s witnesses, such
    that there is only one version of the relevant events
    on which the parties agree, the reviewing court must
    consider that uncontroverted evidence in evaluating a
    claim that the trial court’s findings are clearly errone-
    ous.9 Because, as the majority concedes, the present
    case implicates this standard of review, this court, in
    reviewing the defendant’s claim, must consider all of
    the evidence adduced by the state in determining
    whether the record supports the trial court’s findings
    that the defendant’s cell phone number was not avail-
    able to the police and that the immediacy of the situa-
    tion relieved them of any obligation that they otherwise
    might have had to contact the defendant.
    The majority then addresses the merits of the state’s
    claim that the Appellate Court incorrectly concluded
    that these two findings by the trial court were clearly
    erroneous. With respect to the finding that the defen-
    dant’s cell phone number was not available to the
    police, the majority merely block quotes three pages
    of Barcello’s vague and equivocal testimony, which was
    elicited on cross-examination, about what he recalled
    he may possibly have done on the day in question. Then,
    without any analysis or discussion of that testimony,
    and without any acknowledgment of the undisputed
    facts that undeniably support the contrary conclusion
    of the Appellate Court, the majority summarily asserts
    that, ‘‘[o]n the basis of the foregoing testimony, making
    every reasonable presumption in favor of the trial
    court’s ruling as we are required to do, we conclude
    that there was sufficient evidence in the record to sup-
    port the trial court’s finding that the defendant’s cell
    phone number was unavailable to Barcello at the
    scene.’’ At no point does the majority even attempt to
    explain why Cobb, who concededly knew how to con-
    tact the defendant, was not under a duty to do so, or
    why, at the very least, Cobb was not obligated to inform
    Barcello that he could contact the defendant by calling
    his cell phone.
    The majority determines that the evidence also justi-
    fied the trial court’s finding that the ‘‘immediacy of
    the situation’’ prevented Barcello from obtaining the
    defendant’s cell phone number. In support of this con-
    clusion, the majority refers to the evidence that the trial
    court relied on in concluding that the officers reason-
    ably believed that an emergency existed, namely, the
    overflowing mail, the putrid smell, the dog feces on the
    floor, and the fact that, according to Barcello, he and
    his fellow officers conducted some sort of ‘‘preliminary
    investigation’’—Barcello did not elaborate on the nature
    or extent of that investigation—to ascertain the defen-
    dant’s whereabouts prior to entering his home. The
    majority, however, makes no mention of the fact that
    the officers were on the scene for nearly one hour
    before they entered the defendant’s home, or that they
    were aware that the deplorable conditions were not
    unusual for the defendant’s residence. Nevertheless,
    the majority states, without further explanation, that
    ‘‘[it] cannot conclude that the delays caused by the
    officers in investigating and then seeking backup and
    assistance from the [fire department] . . . negate the
    trial court’s finding that the immediacy of the situation
    prevented Barcello from obtaining the defendant’s cell
    phone number.’’
    The majority further asserts that the Appellate Court
    improperly applied the collective knowledge doctrine,
    pursuant to which the knowledge of one investigating
    officer is imputed to the other investigating officers
    when it is reasonable to do so,10 in concluding that the
    trial court’s finding that Barcello did not have access
    to the defendant’s cell phone number was clearly erro-
    neous. In reaching its determination, the majority
    asserts that it would be inappropriate to apply the col-
    lective knowledge doctrine in cases, like the present
    one, involving the emergency exception to the warrant
    requirement, because ‘‘[i]mposing [on] law enforcement
    officers who are responding to an emergency situation
    the obligation to contact the police station and [to]
    obtain information that may be contained in a police
    file . . . is not consistent with the purpose of the emer-
    gency exception.’’ Text accompanying footnote 7 of the
    majority opinion; see also footnote 7 of the majority
    opinion (‘‘[t]he legitimate reason not to apply the collec-
    tive knowledge doctrine to a search like the one in the
    present case is that it takes away the ability of the police
    to act quickly in an emergency situation’’). Finally, the
    majority concludes that the evidence, viewed in the
    light most favorable to sustaining the trial court’s find-
    ings, was sufficient to support that court’s determina-
    tion that the police harbored an objectively reasonable
    belief that the defendant was inside his home and in
    need of emergency aid.
    The majority’s analysis is fundamentally flawed in a
    number of crucial respects. First, the majority refuses
    to apply the collective knowledge doctrine—specifi-
    cally, it refuses to consider the fact that Cobb knew
    full well how to reach the defendant—without any legiti-
    mate reason for doing so. The majority’s second, and
    most critical, impropriety, stems, in part, from its
    unwarranted failure to treat Cobb as an active partici-
    pant in the events that culminated in the search. Nota-
    bly, the majority cherry-picks evidence from the record
    and ignores certain other undisputed and highly rele-
    vant evidence, in particular, the fact that Cobb had easy
    access to the defendant’s cell phone number and ample
    time to call the defendant’s cell phone. As a result of
    these improprieties, the majority’s evaluation of the
    evidence is hopelessly skewed. Finally, to buttress its
    ultimate determination that the police lawfully entered
    the defendant’s home under the emergency doctrine,
    the majority relies on cases that have no bearing on
    the proper resolution of this case and disregards
    adverse case law that is squarely on point. I address
    each of these defects in turn.
    A
    I turn first to the majority’s refusal to recognize the
    applicability of the collective knowledge doctrine
    because its refusal to do so renders invalid its conclu-
    sion that the defendant’s cell phone number was not
    available to the police. Because Cobb was a sworn
    police officer who arrived at the scene first and
    remained there until the police entered the defendant’s
    home approximately one hour later, the evidence estab-
    lishing that he readily could have retrieved the defen-
    dant’s cell phone number and called him must be
    considered for purposes of determining whether the
    conduct of the police was reasonable under the circum-
    stances. Common sense dictates this conclusion.
    This court routinely applies the doctrine to analogous
    searches and seizures; e.g. State v. Butler, 
    296 Conn. 62
    , 72–73, 
    993 A.2d 970
    (2010) (applying doctrine to
    reasonable suspicion determination); State v. Batts, 
    281 Conn. 682
    , 698, 
    916 A.2d 788
    (applying doctrine to prob-
    able cause determination and review of trial court’s
    denial of hearing under Franks v. Delaware, 
    438 U.S. 154
    , 
    98 S. Ct. 2674
    , 
    57 L. Ed. 2d 667
    [1978]), cert. denied,
    
    552 U.S. 1047
    , 
    128 S. Ct. 667
    , 
    169 L. Ed. 2d 524
    (2007);
    and other jurisdictions have applied it to emergency
    searches. See, e.g., United States v. Huffman, 
    461 F.3d 777
    , 784–85 (6th Cir. 2006) (applying collective knowl-
    edge doctrine in assessing reasonableness of officers’
    belief that emergency existed inside home), cert.
    denied, 
    549 U.S. 1299
    , 
    127 S. Ct. 1863
    , 
    167 L. Ed. 2d 353
    (2007); United States v. Russell, 
    436 F.3d 1086
    , 1094–95
    (9th Cir. 2006) (Thomas, J., concurring in part and dis-
    senting in part) (‘‘[w]e analyze the ‘reasonable grounds
    to believe that there is an emergency at hand,’ on an
    objective basis, taking into consideration the collective
    knowledge of the officers at the time’’); Mitchell v. State,
    
    294 Ark. 264
    , 270, 
    742 S.W.2d 895
    (1988) (‘‘[r]egardless
    of what [the officer] personally knew, he is charged
    with the collective knowledge of the police department
    at the time [of the emergency search]’’); Oliver v. United
    States, 
    656 A.2d 1159
    , 1166 and n.14 (D.C. 1995)
    (applying collective knowledge doctrine in assessing
    reasonableness of emergency search); State v. Lem-
    ieux, 
    726 N.W.2d 783
    , 789 (Minn. 2007) (‘‘[w]hen
    assessing the reasonableness of an emergency-aid
    search, the officer who conducts the search is imputed
    with knowledge of all facts known by other officers
    involved in the investigation, as long as the officers
    have some degree of communication between them’’).
    There simply is no legitimate reason not to apply the
    doctrine to warrantless searches, like the one in the
    present case, based on a purported emergency, because
    it is reasonable to expect investigating officers who are
    working together to share important information about
    their investigation, provided, of course, that it is feasible
    to do so under the circumstances. There is nothing in
    the record of the present case to suggest that it would
    not have been feasible either for Cobb to tell Barcello
    that he could obtain the defendant’s cell phone number,
    or for Barcello to inquire of Cobb and his fellow officers
    whether they knew how to contact the defendant.
    Although Barcello might be excused for failing to ask
    Cobb whether Cobb knew how to reach the defendant—
    because Barcello reasonably would have expected
    Cobb, or any of the other officers on the scene, to alert
    him to the fact that the defendant’s cell phone number
    was readily available—Cobb himself was required to
    take the exceedingly simple investigative step of calling
    the defendant. Because Cobb was required to do so but
    did not, his failure to act necessarily is attributable to
    the police. The majority’s contrary conclusion is sim-
    ply indefensible.
    The majority contends that the collective knowledge
    doctrine applies only to uphold emergency searches
    but not to invalidate them. In support of this assertion,
    the majority states: ‘‘It makes sense that we would want
    to support the community caretaking function of [the]
    police by allowing officers to communicate information
    that may alert one officer responding to a situation that
    there may be other factors that constitute an emergency
    that may not be apparent to the officer who responds.
    On the other hand, it would frustrate the purpose of
    the emergency doctrine to require officers who are first
    responders to a scene that reasonably appears to
    [involve] an emergency to contact the police depart-
    ment to see if there are facts known to other officers
    or in the department’s files that negate what they see
    in person at the scene. Doing so may cause officers to
    lose valuable time.’’ Footnote 7 of the majority opinion.
    In a similar vein, the majority states that ‘‘[i]mposing
    [on] law enforcement officers who are responding to
    an emergency situation the obligation to contact the
    police station and [to] obtain information that may be
    contained in a police file . . . is not consistent with
    the purpose of the emergency exception.’’ Text accom-
    panying footnote 7 of the majority opinion. The obvious
    defect in the majority’s argument is that it begs the
    question: the argument assumes that an emergency
    exists. Of course, if the police confront a situation that
    causes them to reasonably believe that it is necessary
    to enter a dwelling or other property immediately to
    save life or limb, they have every right—in fact, they
    have an obligation—to do so, without conducting any
    additional investigation. In the present case, however,
    the police did not enter the defendant’s residence imme-
    diately because, as they knew, they needed to ascertain
    additional facts to determine whether a true emergency
    existed. In such circumstances, if the police have ready
    access to the cell phone number of the person who is
    the object of their concern, attempting to contact that
    person would be among the very first things, if not the
    very first thing, that a reasonable police officer would
    do. That is especially true when, as in the present case,
    the police previously have contacted that person via
    cell phone in the past.
    Although the collective knowledge doctrine typically
    has been applied for the benefit of the state,11 there is,
    of course, no reason why it should not apply to the
    state’s detriment when, as in the present case, an officer
    involved in an investigation possesses highly relevant
    information that bears directly on the necessity for a
    warrantless search but fails to share that information
    with his fellow officers. As one court has explained,
    when one officer has information concerning the propri-
    ety of a warrantless search and ‘‘could have conveyed
    it to the searching officer in time . . . [that officer] has
    a duty to convey it . . . just as he would if he were
    seeking a warrant. Nor does that duty evaporate . . .
    if the search has already begun, though whether it has
    begun will often affect the feasibility of communicating
    the information in time to stop the search.’’ (Citation
    omitted; emphasis omitted.) United States v. West, 
    321 F.3d 649
    , 651 (7th Cir.), cert. denied, 
    540 U.S. 946
    , 
    124 S. Ct. 385
    , 
    157 L. Ed. 2d 275
    (2003); see also United
    States v. Santa, 
    180 F.3d 20
    , 28 (2d Cir.) (when facts
    known to some officers exonerated defendant, ‘‘the
    issue is whether the failure to communicate [the] facts
    to the arresting officer rendered the mistaken arrest
    unreasonable’’ [internal quotation marks omitted]),
    cert. denied, 
    528 U.S. 943
    , 
    120 S. Ct. 356
    , 
    145 L. Ed. 2d 278
    (1999); United States v. Valez, 
    796 F.2d 24
    , 28 (2d
    Cir. 1986) (same), cert. denied, 
    479 U.S. 1067
    , 107 S.
    Ct. 957, 
    93 L. Ed. 2d 1005
    (1987). The majority’s contrary
    conclusion is predicated on the false premise that the
    police need not communicate with each other even
    when doing so is the only reasonable course of conduct.
    I know of no other legal rule or principle of general
    applicability that is so one-sided and so result driven.
    Not surprisingly, the majority’s determination that
    the collective knowledge doctrine may be applied only
    to uphold a warrantless emergency search and never
    to invalidate one will have truly bizarre and untenable
    consequences. For example, if one of several investiga-
    tive officers actually knew or strongly suspected that
    the subject of the investigation was not in the dwelling
    to be searched, the entry into that dwelling nevertheless
    could be upheld under the emergency doctrine if that
    officer did not reveal that information to the officer
    responsible for making the decision to search the dwell-
    ing for the subject. In other words, under the majority’s
    view, an emergency search of a residence would be
    deemed lawful even when one of the officers involved
    in the search was aware or reasonably believed, prior to
    the search, that the premises actually were unoccupied,
    but the officer simply opted not to share that knowledge
    or belief with the other officers. This cannot possibly
    be the law because such a patently absurd result cannot
    be countenanced. It also cannot be the law that Cobb’s
    failure to alert his colleagues of the ready availability
    of the defendant’s cell phone number somehow relieved
    the police of their duty to attempt to contact the defen-
    dant by calling his cell phone.
    The majority also suggests that it is inappropriate to
    apply the collective knowledge doctrine in the present
    case because it would set a bad precedent for future
    cases. In support of this argument, the majority accuses
    the dissent of advocating a rule pursuant to which the
    police will be required to cull through department files
    and to poll all police personnel to determine whether
    those sources might shed some light on the issue of
    whether an emergency exists. See footnote 7 of the
    majority opinion (asserting that it would be inconsistent
    with purpose of emergency doctrine to require police
    ‘‘to contact the police department to see if there are
    facts known to other officers or in the department’s
    files that negate what they see in person at the scene’’
    and that ‘‘[d]oing so may cause officers to lose valuable
    time’’). In making this argument, the majority sets up
    the proverbial straw man. As the majority well knows,
    I do not contend that police officers responding to an
    emergency must contact the police department to see
    if there are facts known to other officers, or information
    contained in the department’s files, that might contra-
    dict what they themselves observe at the scene. Of
    course, the collective knowledge doctrine imposes no
    such general or blanket obligation on the police.
    Whether an officer would be required to contact the
    police department—or to take any other action to rule
    out the possibility that there is no emergency—always
    will turn on whether an objectively reasonable officer
    would have taken such action in light of the facts known
    at the time of the perceived emergency. Obviously, no
    such communication can be expected if the need for
    swift action renders such communication impracticable
    or imprudent. But when they do have time to communi-
    cate the relevant information, there is no excuse for
    not doing so if the officer reasonably should know that
    sharing that information is necessary to the determina-
    tion of whether a true emergency exists. That is pre-
    cisely the scenario in the present case: a simple call to
    the defendant on his cell phone was an integral and
    necessary part of the investigation that the police under-
    took and deemed necessary to determine whether there
    was an emergency that would have justified the war-
    rantless entry into the defendant’s home.
    Finally, it seems evident that the principles underly-
    ing the collective knowledge doctrine are inherent in
    the reasonableness requirement that governs the
    assessment of the constitutionality of any warrantless
    search, including a search under the emergency doc-
    trine. The legality of any such search turns on a determi-
    nation of whether an objectively reasonable, well
    trained officer would have believed that an emergency
    existed. See State v. Fausel, 
    295 Conn. 785
    , 795, 
    993 A.2d 455
    (2010) (‘‘[t]he test is not whether the officers
    [at the scene] actually believed that an emergency
    existed . . . but whether a reasonable officer would
    have believed that such an emergency existed’’ [internal
    quotation marks omitted]). Reasonableness in this con-
    text is assessed in light of the facts that were known
    to or reasonably discoverable by all of the officers
    involved in the search at the time of the perceived
    emergency. See, e.g., United States v. Tibolt, 
    72 F.3d 965
    , 969 (1st Cir. 1995) (‘‘[t]he ‘exigent circumstances’
    inquiry is limited to the objective facts reasonably
    known to, or discoverable by, the officers at the time
    of the search’’ [emphasis added]), cert. denied, 
    518 U.S. 1020
    , 
    116 S. Ct. 2554
    , 
    135 L. Ed. 2d 1073
    (1996). In the
    present case, there is no question that Cobb knew that
    the defendant’s cell phone number was readily avail-
    able, and, as I have explained, any reasonable officer in
    his position either would have contacted the defendant
    himself or informed Barcello that the defendant easily
    could be contacted.
    B
    Having determined that the majority improperly
    treats Cobb as if he were not a participant in the events
    that culminated in the warrantless search of the defen-
    dant’s home, I next turn to the principal defect in the
    majority opinion, namely, the refusal of the majority to
    examine the trial court’s key findings in light of certain
    uncontroverted and highly relevant facts. Specifically,
    the majority improperly upholds the trial court’s find-
    ings that the defendant’s cell phone number was
    unavailable to the police and, in any event, that there
    was insufficient time for the police to attempt to call the
    defendant, even though the undisputed facts inarguably
    contradict those findings.
    With respect to the first such finding, it is undisputed,
    as I previously discussed, that Cobb, an animal control
    officer, readily could have retrieved the defendant’s cell
    phone number because, as Cobb well knew, the number
    was on file at animal control. Because Cobb had access
    to the defendant’s cell phone number, it is legally irrele-
    vant that Barcello personally may have been unaware
    that the defendant could be reached by phone. Under
    the circumstances, Cobb himself was required to call
    the defendant. Thus, because Cobb knew how to reach
    the defendant, the state cannot claim that the police
    somehow were ignorant of that fact.
    Contrary to the conclusion of the majority, the trial
    court’s second critical finding, namely, that the immedi-
    acy of the situation prevented the officers from calling
    the defendant prior to the search, also was clearly erro-
    neous. As the Appellate Court observed, and the state
    does not dispute, officers were at the defendant’s home
    for almost one hour prior to entering it. See State v.
    
    DeMarco, supra
    , 
    124 Conn. App. 449
    . According to the
    testimony of those officers, Cobb spent the first thirty
    minutes making cell phone calls and waiting for Bar-
    cello to arrive. Cobb also called and spoke to animal
    control during this time frame, and he certainly could
    have obtained the defendant’s cell phone number at
    that time. Thereafter, Barcello spent at least twenty
    minutes at the premises before the search commenced.
    In light of these undisputed facts, it defies credulity
    to conclude that there was inadequate time for Cobb,
    Barcello or Mercado to place a call to the defendant.
    To the contrary, there was plenty of time for them to
    do so; as Cobb testified, they simply neglected to do it.
    Although the majority contends that the trial court’s
    factual findings are supported by the record, what it
    really seems to be arguing is that the trial court’s judg-
    ment can be sustained on the alternative ground that
    the officers’ belief was objectively reasonable despite
    their failure to call the defendant. Thus, the majority
    states that it ‘‘decline[s] to apply the collective knowl-
    edge doctrine [in order] to conclude that the officers
    were required to obtain the defendant’s cell phone num-
    ber from animal control and [to] attempt to contact
    him prior to entering the home.’’ Text accompanying
    footnote 9 of the majority opinion. The majority also
    argues that, ‘‘[a]lthough the dissent may not approve
    of the steps taken by the officers in the present case,
    it is not our role as an appellate court to dictate the
    appropriate steps and questions that police should use
    while investigating.’’ Footnote 5 of the majority opinion.
    Although I agree, of course, that it is not our role to
    dictate the steps that the police must take in conducting
    an investigation, it most certainly is our role to evaluate
    the steps that were taken so that we may determine
    whether they gave rise to an objectively reasonable
    belief that an emergency existed. See, e.g., Nelms v.
    Wellington Way Apartments, LLC, 513 Fed. Appx. 541,
    546 (6th Cir. 2013) (‘‘each time [the] court has upheld
    a warrantless entry based [on] the emergency aid excep-
    tion, credible and reliable evidence established the
    potential for injury to the officers or others and the need
    for swift action’’ [internal quotation marks omitted]);
    LaLonde v. Riverside, 
    204 F.3d 947
    , 957 (9th Cir. 2000)
    (‘‘police [officers] can meet [their heavy] burden only
    by demonstrating specific and articulable facts [that]
    justify the finding of exigent circumstances’’ [internal
    quotation marks omitted]).
    Although the majority asserts that the officers in the
    present case otherwise took appropriate steps and
    asked appropriate questions in the course of their inves-
    tigation, it does not identify a single investigative step
    that would either excuse the officers’ failure to call the
    defendant prior to entering his home or support an
    objectively reasonable belief that the defendant was
    inside his home in need of emergency assistance. Even
    if it is assumed that the police were actively investigat-
    ing the defendant’s whereabouts in the hour that tran-
    spired from the time Cobb arrived at the scene until
    the officers entered the defendant’s home, an obvious
    first step in that investigation would have been to
    attempt to contact the defendant on his cell phone.
    Requiring evidence of such a call, or of some equivalent
    measure, is not Monday morning quarterbacking; it is,
    rather, an essential part of our responsibility as a
    reviewing court to ensure that the state has met its
    heavy burden of demonstrating that the warrantless
    search of the defendant’s dwelling was constitutionally
    justified. See, e.g., Hopkins v. Bonvicino, 
    573 F.3d 752
    ,
    763 (9th Cir. 2009) (emergency exception to warrant
    requirement is ‘‘narrow’’ and its boundaries must be
    ‘‘rigorously guarded’’ by courts ‘‘to prevent any expan-
    sion that would unduly interfere with the sanctity of
    the home’’ [internal quotation marks omitted]), cert.
    denied, 
    559 U.S. 1048
    , 
    130 S. Ct. 2342
    , 
    176 L. Ed. 2d 561
    (2010). Notably, as I discuss more fully hereinafter; see
    part III C of this opinion; in contrast to other emergency
    doctrine cases, in the present case, there were no rap-
    idly developing or emerging events occurring within
    the relevant time frame that made it impracticable for
    the police to place such a call to the defendant. To the
    contrary, for most of that time, the officers were waiting
    around for other officers and rescue personnel to arrive.
    Finally, as the Appellate Court aptly noted, the
    unjustified failure of the police to attempt to contact
    the defendant before entering his home is compounded
    by the fact that virtually all of the conditions that the
    officers encountered there on the day in question—
    conditions that, according to the trial court, supported
    a reasonable belief that the defendant’s life was in
    immediate danger inside the house, including barking
    dogs, multiple vehicles, a horrible odor, and unkempt
    premises—were not the least bit unusual for the defen-
    dant’s property, and the officers were well aware of
    this fact when they made the decision to enter the
    defendant’s home without a warrant. See State v.
    
    DeMarco, supra
    , 
    124 Conn. App. 455
    –56. It is axiomatic
    that when an officer knows or has reason to know that
    a particular condition is normal for a home, even if that
    condition would be extremely unusual for any other
    home, it never will be objectively reasonable for the
    officer to believe that the condition itself is indicative
    of an emergency inside the home.
    In sum, the undisputed facts belie the state’s claim,
    and the majority’s conclusion, that it was not reasonably
    feasible, and therefore unnecessary, for the police to
    attempt to contact the defendant on his cell phone
    prior to entering his home. Because the defendant’s cell
    phone number was readily available to the police and
    they had ample time to retrieve that number and call
    him, they were required to take that most modest and
    obvious investigative step. Moreover, there is nothing
    in the record to suggest that it would have been futile
    for the police to attempt to contact the defendant; on
    the contrary, they reached him on his cell phone imme-
    diately after concluding the warrantless search.12 Con-
    sequently, their failure to call him rendered the war-
    rantless search of the defendant’s home unreasonable.
    C
    Finally, the sparse precedent on which the majority
    relies in support of its conclusion is inapposite to the
    issue presented. In particular, the majority identifies
    three cases that, it claims, buttress the conclusion that,
    as a matter of law, the officers in the present case
    were not obligated to secure the defendant’s cell phone
    number and to attempt to contact him prior to searching
    his home. None of these cases, however, bears any
    factual similarity to the present case, which likely
    explains why the majority does not discuss the facts
    of any of them. Indeed, one such case, State v. Myers,
    
    601 P.2d 239
    (Alaska 1979), does not even involve a
    search conducted pursuant to the emergency doctrine,13
    and another, United States v. Wayne, 
    318 F.2d 205
    , 207,
    211 (D.C. Cir. 1963), cert. denied, 
    375 U.S. 860
    , 84 S.
    Ct. 125, 
    11 L. Ed. 2d 86
    (1963), involved a paradigmatic
    emergency: the police forcibly entered and searched a
    locked apartment without a warrant after receiving a
    report that a dying or unconscious woman was being
    held inside. With respect to the third case, Hunsberger
    v. Wood, 
    570 F.3d 546
    (4th Cir. 2009), cert. denied, 
    559 U.S. 938
    , 
    130 S. Ct. 1523
    , 
    176 L. Ed. 2d 113
    (2010), the
    majority asserts that the ‘‘the Fourth Circuit Court of
    Appeals [in that case] rejected a similar claim,’’ namely,
    that an officer should have obtained a homeowner’s
    telephone number ‘‘and attempted to call him before
    entering [his home].’’14 Although one of the issues in
    Hunsberger was whether an emergency search of a
    residence was objectively reasonable in light of the
    failure of the police to call the homeowner prior to the
    search, that is the only similarity between that case and
    this case.
    In Hunsberger, the police were called to the plaintiffs’
    residence by a neighbor who had observed strangers
    entering the residence at a time when she believed the
    plaintiffs were on vacation. See Hunsberger v. 
    Wood, supra
    , 
    570 F.3d 549
    –50. When the police initially arrived,
    there were lights on inside the home and two cars
    parked in front of the home. 
    Id., 549. Seeing
    nothing
    suspicious, the officers left. 
    Id. Later in
    the evening,
    the police were summoned again to the plaintiffs’ home
    by the same neighbor, who reported possible vandals
    or burglars inside the home. 
    Id., 550. This
    time, when
    the police arrived, there were three cars parked in front
    of the residence, all of which were partially blocking
    the road. 
    Id. The police
    also observed a young man
    enter the house through the garage. 
    Id. ‘‘The officers
    decided to ask the occupants of the . . . home to move
    their cars and [to] avoid disturbing the neighbors. They
    each pulled their cars into the . . . home’s driveway,
    at which point [the officers] noticed the lights inside
    the house turn off. [The officers] exited their vehicles,
    approached the house, and rang the . . . doorbell
    twenty-five or thirty times. No one came to the door.’’
    
    Id. ‘‘Walking back
    to their cars, the . . . officers
    noticed that the previously closed side door to the
    garage . . . . was now open.’’ 
    Id. At this
    point, the officers’ investigation began in ear-
    nest. As the Fourth Circuit explained: ‘‘It struck [the
    officers] as suspicious that the occupants of the home
    had turned off the lights when the officers approached,
    had refused to answer the door, and had apparently
    fled the home. Given [the next-door neighbor’s] claim
    that the [plaintiffs] might be out of town, [the officers]
    became concerned about the possibility of vandalism.
    [They] also took into consideration the fact that two
    weeks earlier a vacant house nearby had burned down
    as the apparent result of unauthorized use.’’ 
    Id. The officers
    therefore ‘‘decided to contact the [police] dis-
    patcher to identify the owners of the vehicles in front
    of the house using the . . . license plate information.
    The dispatcher routed calls to each of the car owners
    [from the] cell phone [of one of the officers, who then]
    spoke to several parents including William Blessard
    . . . . Each agreed to pick up his or her respective
    vehicle.’’ 
    Id. ‘‘Blessard was
    the first parent to arrive.
    Blessard told [the officers] that [his stepdaughter, who
    had been driving his vehicle] was supposed to be sleep-
    ing over at a friend’s house, and that he did not know
    why [his] car was at the home of the [plaintiffs], whom
    he did not know. Blessard called [his stepdaughter’s
    cell phone] several times, but she did not answer. He
    became worried for the welfare of his stepdaughter.’’
    
    Id., 550–51. ‘‘[The
    officers] suggested to Blessard that they see if
    anyone would come to the [plaintiffs’ front] door if they
    rang the doorbell. Walking [toward] the front door, [the
    officers] passed the garage . . . [and] . . . heard
    something being knocked over. [The officers] stepped
    inside the garage and then heard the door that con-
    nected the garage to the house’s basement shut and
    lock. Blessard followed [the officers] into the garage,
    walked down the steps to the basement door, knocked
    repeatedly, and shouted [his stepdaughter’s] name. No
    one came to the door, and Blessard’s apprehensions
    rose.’’ 
    Id., 551. One
    of the officers ‘‘then approached
    the door inside the garage that opened into the first
    floor of the home. He discovered it was unlocked. The
    series of strange happenings had increased [his] fears
    of vandalism as well as his concern for the welfare of
    Blessard’s stepdaughter. At that point, [the officers]
    decided to enter the home.’’ 
    Id. As the
    foregoing facts demonstrate, Hunsberger is
    readily distinguishable from the present case. In Huns-
    berger, the reasonableness of the warrantless search
    could be established on the basis of the investigative
    steps that the officers took, prior to entering the plain-
    tiffs’ home, to determine whether an emergency existed
    inside the home. These steps included, among other
    things, contacting the owners of all of the vehicles in
    front of the home to determine whether the vehicles
    were there for a reason. See 
    id., 550. Moreover,
    unlike
    in the present case, the police in Hunsberger were
    responding to a neighbor’s reports of suspicious activity
    inside or around the home, activity that the officers
    themselves had observed over the course of the eve-
    ning, when the homeowners supposedly were out of
    town. See 
    id., 549–51. The
    officers also were responding
    to a stepfather’s concerns about his missing stepdaugh-
    ter, whom they had reason to believe was inside the
    plaintiffs’ home but not responding to her cell phone.
    See 
    id., 550–51. In
    stark contrast to Hunsberger, the police in the
    present case had little or no cause to believe that the
    defendant was missing or otherwise in harm’s way.
    Equally important, they made no effort to rule out the
    possibility that he was not seriously injured or in immi-
    nent danger, even though they had ample time and
    opportunity to do so. Although courts have upheld
    emergency searches in cases involving similar delays
    preceding a search, they have done so only when the
    evidence established that the officers used the time to
    actively investigate the surrounding circumstances to
    ascertain whether their concerns were well founded.
    See, e.g., United States v. Jones, 
    635 F.2d 1357
    , 1362
    (8th Cir. 1980) (‘‘[w]hen the police have a reasonable
    suspicion that someone is injured or that the public
    safety is in jeopardy, but refrain from taking immediate
    action in an effort to confirm or deny the suspicion,
    and then act once they have received no indication that
    the danger has been dissipated, the waiting period does
    not defeat the applicable exception to the warrant
    rule’’); United States v. Brandwein, United States Dis-
    trict Court, Docket No. 2:11-CR-04015-01/02-BCW (W.D.
    Mo. March 28, 2013) (‘‘Both defendants have also
    asserted that there was not a true emergency . . .
    because there was a delay of approximately . . .
    [forty-five] minutes before the officers made the deci-
    sion to unlock the door and search the home. The
    [c]ourt does not believe this is a persuasive argument.
    The record is clear that it took this amount of time
    for both [officers] . . . to conduct their preliminary
    investigation. The officers needed the time to assess
    the seriousness of the situation and [to] arrive at their
    determination that there was a very reasonable possibil-
    ity that one or both of the residents of the home were
    likely inside and in need of assistance.’’); Common-
    wealth v. Purnell, Virginia Court of Appeals, Docket
    No. 1761-02-1 (Va. App. December 23, 2002) (‘‘During
    the approximate two hour period before [the officers]
    entered the home, [they] were consistently and busily
    attempting to investigate the matter further and [to]
    determine a resolution to the problem. Neither the lapse
    of time . . . nor the investigation dissipated the poten-
    tial urgency of the situation.’’). In marked contrast to
    these cases, the officers in the present case did virtually
    nothing that they reasonably would have been expected
    to do to determine whether the defendant was, in fact,
    at home and in need of emergency assistance. Most
    important, the officers failed to call the defendant—
    because they did not think to call him—even though
    they had access to his cell phone number and even
    though calling him would have been the most logical,
    investigative first step for the officers to have taken.
    Moreover, as I previously noted, the fact that the
    officers called and reached the defendant on his cell
    phone immediately after the search makes it perfectly
    clear that they did not believe—because they had no
    reason to believe—that calling the defendant would
    be futile. Their failure to call him renders the search
    unreasonable because, in order to justify a search under
    the emergency doctrine, an officer ‘‘must have valid
    reasons for the belief that an emergency exists, a belief
    that must be grounded in empirical facts rather than
    subjective feelings . . . .’’ (Emphasis added; internal
    quotation marks omitted.) State v. 
    Fausel, supra
    , 
    295 Conn. 795
    . Implicit in this standard is the requirement
    that the police take objectively reasonable steps under
    the circumstances to eliminate the likelihood that, in
    fact, there is no emergency. Cf. Commonwealth v. Pur-
    
    nell, supra
    , Virginia Court of Appeals, Docket No. 1761-
    02-1 (upholding emergency search of residence when,
    prior to entry, officers unsuccessfully tried to contact
    defendant by calling his home telephone and cell phone
    numbers). Thus, the Appellate Court correctly observed
    that the facts of the present case bear no likeness to
    the facts of those cases in which this and other courts
    have found warrantless searches to be justified under
    the emergency doctrine. See State v. 
    DeMarco, supra
    ,
    
    124 Conn. App. 452
    –53. ‘‘The police did not respond to
    the defendant’s home as a result of an alarm, there was
    no evidence that a violent criminal offender might be
    hiding in the house, no evidence of a break-in and no
    signs of a struggle or blood or any other indication of
    a potentially dangerous situation.’’15 Id.; see also United
    States v. 
    Brandwein, supra
    , United States District
    Court, Docket No. 2:11-CR-04015-01/02-BCW (‘‘It is
    worth noting that all cases [in which] a court has found
    that an exigent circumstance existed appear to share
    two common factors. First, in all of the cases in which
    courts found exigency, officers observed events obvi-
    ously occurring within the residence or building . . .
    [f]or example, cries for help, screams, loud noises, or
    an observation of a struggle or fight within the structure
    [that was visible] through a window. Second, courts
    have found exigent circumstances exist when officers
    observed events or evidence leading directly to a struc-
    ture . . . [f]or example, a blood trail leading to a
    closed door.’’).
    The trial court in the present case nevertheless con-
    cluded that an objectively reasonable officer would
    have believed that an emergency existed on the basis
    of the odor emanating from the house, the dilapidated
    condition of the premises, the accumulation of mail, the
    multiple vehicles on the front lawn, and the defendant’s
    failure to respond to a note that Cobb had left ten
    days earlier. As the Appellate Court explained, however,
    none of these facts, either alone or in combination,
    justified an immediate search of the defendant’s home
    because, as strange or abhorrent as these conditions
    otherwise may have seemed, they were not unusual for
    the defendant’s home. See State v. 
    DeMarco, supra
    , 
    124 Conn. App. 455
    –56. Cobb and Hollywood both testified
    that animal control had been dealing with the odor
    problem for years, the house had been in a state of
    disrepair for years, the defendant had left multiple vehi-
    cles on his front lawn for years, and the defendant’s
    dogs had been neglected for years. Cf. United States
    v. Martinez, 
    643 F.3d 1292
    , 1297 (10th Cir. 2011) (‘‘Some
    households are tidy, others are not. A person’s failure
    to keep an orderly home should not subject him or her
    to a warrantless search by police.’’); see also State v.
    Geisler, 
    222 Conn. 672
    , 687, 
    610 A.2d 1225
    (1992) (‘‘The
    poorest man may in his cottage bid defiance to all the
    forces of the crown. It may be frail; its roof may shake;
    the wind may blow through it; the storm may enter; the
    rain may enter; but the King of England cannot enter—
    all his force dares not cross the threshold of the ruined
    tenement!’’ [Internal quotation marks omitted.]).
    Rather, the present case bears a striking resemblance
    to State v. Vargas, 
    213 N.J. 301
    , 
    63 A.3d 175
    (2013), in
    which the New Jersey Supreme Court recently con-
    cluded on very similar facts that a search was not justi-
    fied under the emergency exception to the warrant
    requirement. In that case, ‘‘a landlord called the police
    because he had not seen or been able to contact a
    tenant for two weeks. During the two-week period,
    the tenant’s garbage was not placed curbside, his mail
    accumulated, his car remained unmoved, and his
    monthly rent went unpaid. The landlord expressed con-
    cern for the tenant’s well-being, and the police entered
    the [tenant’s residence] without a warrant and con-
    ducted a ‘welfare check.’ The tenant was not at home,
    but the search uncovered evidence that led to the ten-
    ant’s indictment.’’ 
    Id., 305. ‘‘The
    trial court suppressed
    the evidence because the warrantless entry and search
    were not prompted by an objectively reasonable emer-
    gency. The Appellate Division [of the New Jersey Supe-
    rior Court] reversed, concluding that the community-
    caretaking doctrine did not require an exigency to con-
    duct a warrantless search; it only required that the
    police act reasonably.’’ 
    Id. In reversing
    the judgment of the Appellate Division;
    
    id., 329; the
    New Jersey Supreme Court noted that the
    essential facts of the case were ‘‘basically undisputed.’’
    
    Id., 327. The
    tenant, who was generally reliable, had
    not responded to several cell phone voicemail messages
    regarding nonpayment of rent, his car had not been
    moved in several weeks, his mailbox was full and he
    had not taken out his trash. See 
    id., 305, 307,
    327. On
    the basis of this information, several officers entered
    the tenant’s home to conduct a welfare check, without
    first attempting to contact him by phone. See 
    id., 308, 327.
    In concluding that the conditions that the officers
    observed did not justify the warrantless search under
    the emergency exception to the warrant requirement,16
    the New Jersey Supreme Court stated: ‘‘Whatever legiti-
    mate worries [the landlord] had about [his tenant’s]
    welfare before dialing 9-1-1, he did not attempt to call
    [the tenant’s] emergency contact number or place of
    business . . . [nor did he provide the police with the
    tenant’s contact information so they could call him].
    Indeed, [the landlord] did not know any of the personal
    details of the rhythms of [the tenant’s] life, including
    whether and for how long he either vacationed, took
    business trips, or traveled to meet with family.
    ‘‘In that regard, this is unlike the case of a close family
    member whose housebound elderly relative is not
    responding to telephone calls and knocks on the door.
    Nor is this like the case of a diabetic or infirm neighbor
    who is not seen carrying out routine daily activities and
    who is not answering the door or the telephone. We
    need not describe the myriad circumstances that might
    give rise to an objectively reasonable basis to believe
    that an emergency requires immediate action for the
    safety or welfare of another. Suffice it to say, those
    objectively reasonable circumstances were not found
    to be present here.’’17 
    Id., 327. The
    court in Vargas also emphasized that the person
    who had requested the police to check on the tenant,
    namely, the defendant’s landlord, ‘‘did not live in the
    building where [the tenant] resided. The police officers
    who responded to his call learned only that [the tenant]
    had not been seen for two weeks and, during that time,
    [the tenant] had not picked up his mail, moved his car,
    or paid his rent and utility bills. [The landlord, however]
    could not convey anything about [the tenant’s] routines,
    habits, or vulnerabilities. With this limited information,
    [the landlord] unlocked the apartment door, and the
    officers conducted a ‘welfare check.’ Although the
    police officers entered [the tenant’s] residence without
    a warrant out of their expressed concern for the tenant’s
    safety, the [s]tate concedes that neither the emergency-
    aid nor the exigent-circumstances exception to the war-
    rant requirement justified the entry or search.’’ 
    Id., 327–28. As
    in Vargas, whatever concerns Cobb or any of
    the other officers may have had about the defendant’s
    welfare, they made no effort to contact him before
    entering his home, even though they had his contact
    information. According to Barcello, the search was con-
    ducted entirely on the basis of the information provided
    by Cobb. Like the landlord in Vargas, however, Cobb
    knew nothing about the details of the defendant’s life.
    For example, he did not know whether the defendant
    was employed or unemployed, or whether he lived
    alone. He also did not know whether the defendant
    attended church, which could have explained where
    the defendant was when Cobb arrived unannounced at
    11 a.m. on the Sunday morning in question. Apart from
    the fact that the defendant had more dogs than he could
    care for and his house always smelled terrible as a
    result, the only other thing that Cobb believed he knew
    about the defendant was that he had not responded to
    a notice that Cobb had left ten days earlier on the
    windshield of one of the multiple vehicles that were
    typically parked on the defendant’s front lawn.18 Like
    Vargas, the present case lacks facts that would have led
    an objectively reasonable officer to deem it necessary to
    conduct an immediate search of the defendant’s resi-
    dence, at least without first trying to call the defendant
    and attempting to obtain relevant information about
    him from people who actually knew him and were famil-
    iar with his daily routine. Indeed, the majority has not
    identified a single case, and my research has not uncov-
    ered one, in which an emergency search was upheld
    under similar facts.
    Instead, the majority relies on a handful of readily
    distinguishable cases in which a foul odor was found
    to have justified an emergency search of a residence.
    United States v. Presler, 
    610 F.2d 1206
    , 1209, 1211 (4th
    Cir. 1979); People v. McGee, 
    140 Ill. App. 3d 677
    , 678–79,
    682, 
    489 N.E.2d 439
    (1986); People v. Molnar, 
    288 Ohio App. Div
    . 2d 911, 911–12, 
    732 N.Y.S.2d 788
    (2001), aff’d, 
    98 N.Y.2d 328
    , 
    774 N.E.2d 738
    , 
    746 N.Y.S.2d 673
    (2002);
    Rauscher v. State, 
    129 S.W.3d 714
    , 717, 722 (Tex. App.
    2004); State v. York, 
    159 Wis. 2d 215
    , 217–18, 223, 
    464 N.W.2d 36
    (App. 1990), review denied, 
    465 N.W.2d 656
    (Wis. 1991). In most of these cases, however, persons
    familiar with the residence or the landlord or owner
    had reported the odor as something entirely out of the
    ordinary and of grave concern because the resident had
    not been seen in several days. See, e.g., United States
    v. 
    Presler, supra
    , 1209; State v. 
    York, supra
    , 217–18. In
    one of these cases, the investigating officer smelled
    what he believed to be a dead body. People v. 
    McGee, supra
    , 679. In the present case, by contrast, no one had
    reported the defendant missing, and the odor emanating
    from his home was not at all out of the ordinary. In
    fact, on the day in question, Cobb was following up on
    a prior foul odor complaint, one of many that his office
    had received over the years. Thus, the result that the
    majority reaches finds no support in the case law involv-
    ing the emergency exception to the warrant require-
    ment. On the contrary, that precedent dictates the
    opposite result.
    IV
    CONCLUSION
    It is a ‘‘basic principle of [f]ourth [a]mendment law
    that searches and seizures inside a home without a
    warrant are presumptively unreasonable . . . .’’ (Inter-
    nal quotation marks omitted.) Groh v. Ramirez, 
    540 U.S. 551
    , 559, 
    124 S. Ct. 1284
    , 
    157 L. Ed. 2d 1068
    (2004).
    Moreover, ‘‘[t]he [f]ourth [a]mendment’s requirements
    regarding search warrants are not formalities. . . . By
    requiring police officers first to obtain a warrant before
    they search a person’s home, unless some exception
    applies that permits a warrantless search, the [f]ourth
    [a]mendment has interposed a magistrate between the
    citizen and the police, not to shield criminals nor to
    make the home a safe haven for illegal activities, but
    rather to ensure that an objective mind might weigh
    the need to invade that privacy in order to enforce
    the law.’’ (Citation omitted; internal quotation marks
    omitted.) United States v. Voustianiouk, 
    685 F.3d 206
    ,
    210–11 (2d Cir. 2012), quoting McDonald v. United
    States, 
    335 U.S. 451
    , 455, 
    69 S. Ct. 191
    , 
    93 L. Ed. 153
    (1948). Indeed, ‘‘physical entry of the home is the chief
    evil against which the wording of the [f]ourth [a]mend-
    ment is directed.’’ (Internal quotation marks omitted.)
    Payton v. New York, 
    445 U.S. 573
    , 585, 
    100 S. Ct. 1371
    ,
    
    63 L. Ed. 2d 639
    (1980). ‘‘Searches conducted pursuant
    to emergency circumstances are one of the recognized
    exceptions to the warrant requirement under both the
    federal and state constitutions.’’ (Internal quotation
    marks omitted.) State v. 
    Fausel, supra
    , 
    295 Conn. 794
    .
    ‘‘The emergency exception to the warrant requirement
    allows police to enter a home without a warrant when
    they have an objectively reasonable basis for believing
    that an occupant is seriously injured or imminently
    threatened with such injury. . . . Nevertheless, the
    emergency doctrine does not give the state an unre-
    stricted invitation to enter the home. [G]iven the ratio-
    nale for this very limited exception, the state actors
    making the search must have reason to believe that life
    or limb is in immediate jeopardy and that the intrusion
    is reasonably necessary to alleviate the threat. . . .
    The police, in order to avail themselves of this excep-
    tion, must have valid reasons for the belief that an
    emergency exists, a belief that must be grounded in
    empirical facts rather than subjective feelings . . . . It
    is an objective and not a subjective test. The test is not
    whether the officers actually believed that an emer-
    gency existed . . . but whether a reasonable officer
    would have believed that such an emergency existed.
    . . . The state bears the burden of demonstrating that
    a warrantless entry falls within the emergency excep-
    tion.’’ (Citations omitted; internal quotation marks omit-
    ted.) 
    Id., 794–95. In
    the present case, the state has failed to meet its
    burden of demonstrating that the warrantless search
    of the defendant’s home was objectively reasonable in
    light of the facts that were known to or readily dis-
    coverable by the officers who conducted the search.
    In particular, the state has made no effort to justify the
    officers’ failure to attempt to call the defendant even
    though they knew that the smell, the vehicles on the
    front lawn and the otherwise unkempt condition of the
    premises were hardly unusual. It therefore requires no
    second guessing of the trial court or the officers on the
    ground to conclude that the warrantless search in the
    present case was objectively unreasonable in view of
    the officers’ failure to make any effort to reach the
    defendant on his cell phone, a call that would have
    obviated any possible concern about the perceived need
    for the warrantless intrusion into the defendant’s home.
    On the contrary, even the most deferential review of
    the trial court’s fact-finding leads inexorably to this
    conclusion. I therefore dissent.
    1
    Of course, ‘‘the emergency doctrine does not give the state an
    unrestricted invitation to enter the home. [G]iven the rationale for this very
    limited exception, the state actors making the search must have reason to
    believe that life or limb is in immediate jeopardy and that the intrusion is
    reasonably necessary to alleviate the threat. . . . The police, in order to
    avail themselves of this exception, must have valid reasons for the belief
    that an emergency exists, a belief that must be grounded in empirical facts
    rather than subjective feelings . . . . It is an objective and not a subjective
    test. The test is not whether the officers actually believed that an emergency
    existed . . . but whether a reasonable officer would have believed that
    such an emergency existed.’’ (Citations omitted; footnote omitted; internal
    quotation marks omitted.) State v. Geisler, 
    222 Conn. 672
    , 691–92, 
    610 A.2d 1225
    (1992).
    2
    In a given case, the state might be able to establish that it would have
    been futile, and therefore unnecessary, for the police to have tried to contact
    the person who is feared to be in danger inside the dwelling, even if they
    had time to do so. That, however, is not the case here, and the state makes
    no such claim. Indeed, it is undisputed that the police did, in fact, reach
    the defendant via cell phone immediately after completing the search of his
    home, at which time the defendant promptly returned home.
    3
    Under the collective knowledge doctrine applicable to police investiga-
    tions, the knowledge of any one investigative officer is imputed to the other
    officers involved in the investigation. Although we sometimes have described
    the doctrine in somewhat broader terms; see, e.g., State v. Butler, 
    296 Conn. 62
    , 72, 
    993 A.2d 970
    (2010) (‘‘in testing the amount of evidence that supports
    probable cause, it is not the personal knowledge of the arresting officer
    . . . but the collective knowledge of the law enforcement organization at
    the time of the arrest that must be considered’’ [internal quotation marks
    omitted]); for present purposes, its applicability may be limited to circum-
    stances such as those in the present case, in which there is active communica-
    tion between the officers involved in the investigation.
    4
    For the reasons set forth in this opinion, I also agree with the Appellate
    Court that the factual scenario with which the police were confronted in
    the present case simply does not rise to the level of an emergency that
    would justify a warrantless entry into the defendant’s home. See State v.
    
    DeMarco, supra
    , 
    124 Conn. App. 450
    –51. Indeed, on the present record, I
    do not believe that the state has established that the police would have
    been justified in entering the defendant’s home without a warrant when
    they did, even if they had tried and failed to contact the defendant. The
    failure of the police to take that threshold investigative step, however, clearly
    is fatal to the state’s claim under the emergency doctrine. I therefore focus
    on that issue.
    5
    Cobb testified that, as he approached the house on foot, he smelled a
    horrible odor that he thought was from dog feces. When he knocked on the
    door, the door opened, and he could see feces all over the floor. He also
    smelled the strong stench of ammonia. When the door opened, one dog ran
    toward him, so he closed the door quickly. He also could hear other dogs
    barking inside the house.
    6
    One neighbor responded that he had not seen him recently.
    7
    The record reveals that the mailbox in question was approximately five
    by fifteen inches and was attached to the house. According to Cobb, although
    he did not actually examine any of the mail, some of it ‘‘looked like it had
    been there several days. . . . [There] was like a grocery store flyer, some-
    thing like that, and there were other items in the mailbox at that time.’’
    8
    The Appellate Court explained: ‘‘Cobb knew about the number, [animal
    control] was in possession of the number, and, accordingly, [the court]
    conclude[s] that the finding by the court that Barcello did not have the
    defendant’s cell phone number available to him while he was at the defen-
    dant’s residence and before he decided to order the warrantless entry was
    clearly erroneous.’’ State v. 
    DeMarco, supra
    , 
    124 Conn. App. 448
    .
    9
    More specifically, the majority states: ‘‘[I]f, upon examination of the
    testimonial record, the reviewing court discovers but one version of the
    relevant events [on] which both the state and the defendant agree, and such
    agreement exists both at trial and on appeal, the reviewing court may rely
    on that version of events in evaluating the propriety of the trial court’s
    determinations and [in] determining whether the trial court’s factual findings
    are supported by substantial evidence. In a case [in which] the trial court
    has concluded that the police action at issue was justified and the undisputed
    version of events reflected in the transcript was adduced by the state through
    [the] testimony of the police officers who were involved, a reviewing court’s
    reliance on that version of [the] events is particularly appropriate. If the
    officers’ own testimony as to what occurred is internally consistent and
    uncontested by the defendant but, in fact, undercuts the trial court’s ruling
    in favor of the state, a reviewing court would be remiss in failing to consider
    it.’’ Text accompanying footnote 4 of the majority opinion. The majority
    acknowledges that these requirements are satisfied in the present case.
    10
    See footnote 3 of this opinion.
    11
    Ordinarily, the collective knowledge doctrine is applied to defeat a
    challenge to the legality of an arrest or detention on the ground that the
    individual police officer responsible for arresting or detaining the defendant
    personally did not have probable cause or reasonable suspicion to do so.
    Under the doctrine, an arrest or detention is not unlawful, even if the
    arresting or detaining officer himself lacked probable cause or reasonable
    suspicion, as long as other participating officers were aware of facts suffi-
    cient to satisfy the requisite standard.
    12
    The majority criticizes me for observing that the police reached the
    defendant on his cell phone immediately after completing their search of
    his home. See footnote 11 of the majority opinion (‘‘We note that the dissent
    bolsters its argument with reference to the amount of time it took to notify
    the defendant that the police were looking for him, and, thereafter, how
    long it took [for] him to appear at his house. We evaluate the situation, as
    the trial court did, at the time the police entered the house, based [on] the
    totality of the circumstances at that time in order to make a determination [of
    whether] a police officer reasonably would have believed that an emergency
    existed. A resort to circumstances that occurred subsequent to that time
    would not be prudent and would distort the analysis.’’); see also State v.
    
    DeMarco, supra
    , 
    124 Conn. App. 471
    (Beach, J., dissenting) (‘‘[alt]hough the
    defendant perhaps could have been called prior to the entry, he was not
    called, and we ought not speculate about the result of a call not made’’). It
    cannot reasonably be argued that the police can fail to take a required
    investigative step—a step that is necessary to safeguard the defendant’s
    constitutional rights—and then be relieved of responsibility for failing to
    take that required action on the ground that we cannot know for certain
    that the action would have been successful. In such circumstances, the
    burden should be on the state to demonstrate why the required action likely
    would not have achieved its intended result. In any event, in the present
    case, the police called the defendant on his cell phone promptly after they
    searched his home, and he answered that call. Because there is no reason
    to believe that the defendant would not have answered his cell phone if the
    police had called him a few minutes earlier, before they searched his home,
    the record establishes beyond any reasonable doubt that a timely call to
    the defendant would not have gone unheeded. Moreover, in view of the fact
    that the police themselves bear responsibility for failing to call the defendant
    when they should have called him, the majority cannot reasonably preclude
    consideration of the only evidence on that issue and then maintain that
    there is nothing in the record to indicate that the defendant would have
    answered the call if it had been made.
    13
    In Myers, the police entered and briefly searched a commercial establish-
    ment upon finding a door wide open in the middle of the night. State v.
    
    Myers, supra
    , 
    601 P.2d 240
    . After observing that ‘‘the fourth amendment
    neither compels us to ignore the profound differences distinguishing one’s
    home from one’s business, nor compels us to presume that people desire
    or expect the police to conduct themselves in identical fashion with respect
    to each’’; 
    id., 242–43; the
    Alaska Supreme Court concluded that a routine
    business security check such as the one that occurred in that case was per
    se reasonable under the United States and Alaska constitutions. See 
    id., 241–42, 244.
        14
    Hunsberger is a civil case in which the plaintiffs were seeking damages
    for the allegedly unlawful search of their home. See Hunsberger v. 
    Wood, supra
    , 
    570 F.3d 549
    .
    15
    The majority takes issue with the Appellate Court’s observation that
    the present case bears none of the features of a typical emergency exception
    case; State v. 
    DeMarco, supra
    , 
    124 Conn. App. 452
    ; stating that ‘‘this court
    has repeatedly recognized that [d]irect evidence of an emergency is not
    required because the emergency exception to the warrant requirement arises
    out of the caretaking function of the police.’’ (Internal quotation marks
    omitted.) Footnote 10 of the majority opinion, quoting State v. 
    Fausel, supra
    ,
    
    295 Conn. 800
    . The majority’s assertion misses the point. In explaining that
    the present case bears no resemblance to the typical emergency exception
    case, which normally involves cries for help, gunshots, fire, threats to human
    life, or reports of a missing person, the Appellate Court was simply and
    correctly pointing out that the state, in order to meet its burden in the
    present case, was required to demonstrate that, during the hour leading up
    to the warrantless entry, the police took appropriate steps to determine
    whether a true emergency existed.
    16
    In Vargas, the New Jersey Supreme Court rejected the conclusion of
    the Appellate Division that a warrantless search under the community-
    caretaking doctrine did not require exigent or emergency circumstances;
    see State v. 
    Vargas, supra
    , 
    213 N.J. 328
    ; and addressed the issue of whether
    there were sufficiently exigent circumstances in that case to justify the
    warrantless entry into the tenant’s residence. See 
    id., 327, 329.
    In Vargas,
    the state of New Jersey actually conceded that the facts did not support an
    emergency search; 
    id., 328; and
    the Supreme Court of New Jersey agreed
    with that concession. See 
    id., 329. 17
          Notwithstanding marked similarities between Vargas and the present
    case, the majority argues that my reliance on Vargas is misplaced because,
    in that case, the state of New Jersey conceded that the facts did not support
    the application of the emergency exception. See footnote 10 of the majority
    opinion; see also State v. 
    Vargas, supra
    , 
    213 N.J. 328
    . The majority asserts
    that, ‘‘[o]n the basis of the state’s concession in Vargas, the New Jersey
    Supreme Court’s analysis in that case is of little use in the present case [in
    which] the precise issue is whether . . . the facts permit the invocation of
    the exigent circumstances exception to the warrant requirement.’’ Footnote
    10 of the majority opinion. The majority, however, fails to explain why
    Vargas is of ‘‘little use . . . .’’ 
    Id. Certainly, it
    is of little use to the majority
    because, on virtually identical facts, the Supreme Court of New Jersey
    reached a conclusion that is diametrically opposed to the conclusion that the
    majority reaches in the present case. Contrary to the majority’s assertions,
    however, the court in Vargas did not simply reject the state’s claim that
    the community-caretaking doctrine did not require proof that the officers
    had an objectively reasonable belief that an emergency existed. Indeed, in
    marked contrast to the analysis of the majority in the present case, the
    court in Vargas painstakingly applied the correct legal standard to the
    operative facts, explaining in detail why those facts did not support an
    objectively reasonable belief that an emergency existed. See State v. 
    Vargas, supra
    , 
    213 N.J. 328
    –29. The state’s concession in Vargas that the court was
    correct in its analysis of the facts in no way detracts from that analysis.
    18
    The majority underscores Cobb’s testimony that the defendant was
    usually pretty prompt about responding to such notices as supporting an
    objectively reasonable belief that an emergency existed inside the defen-
    dant’s home. Specifically, the majority asserts: ‘‘Under the facts of the present
    case . . . although entry was not possible immediately, it is clear that ani-
    mal control had a history with the defendant and that typically the defendant
    responded to notices left by animal control. The fact that the defendant
    called animal control, unbeknownst to Cobb, the day after the first notice
    was left, demonstrates that Cobb’s view of the defendant’s conduct was
    correct. Therefore, the fact that the notices, which were left approximately
    ten days before, were still outside and seemingly ignored made it more
    likely that an emergency existed inside the home.’’ Footnote 8 of the majority
    opinion. Although the defendant’s seeming failure to respond to Cobb’s
    notice may have been grounds to commence an investigation, it hardly
    supported an objectively reasonable belief that it was necessary to conduct
    an immediate search of the defendant’s home without a warrant. Indeed,
    Cobb testified that he could not recall whether he even had indicated on
    the notice form, by checking a designated box, what his visit had been about
    or why the defendant needed to contact animal control. I note, moreover,
    that, if Cobb and his fellow officers had taken even the most basic investiga-
    tive steps to determine whether an emergency existed, they likely would
    have learned, as the majority itself notes, that the defendant had in fact
    been in touch with animal control shortly after Cobb’s prior visit. Of course,
    this knowledge alone would have obviated any possible rationale for a
    search under the emergency exception to the warrant requirement.