Epright v. Liberty Mutual Ins. Co. ( 2022 )


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    JACQUELINE EPRIGHT v. LIBERTY
    MUTUAL INSURANCE COMPANY
    (AC 43969)
    Alvord, Moll and Sheldon, Js.
    Syllabus
    The plaintiff in error, B Co., a law firm that represented the plaintiff, E, in
    the underlying action to recover underinsured motorist benefits from
    the defendant in error, L Co., filed a writ of error claiming that the trial
    court improperly ordered sanctions, requiring B Co. to pay all costs
    related to L Co.’s retention of D, an expert disclosed by L Co. as a
    potential trial witness in the underlying case. L Co.’s disclosure indicated
    that, on the basis of his review of E’s medical records, D would opine
    that E’s shoulder injury was not related to the underlying motor vehicle
    accident. During his deposition, however, D indicated that his opinion
    might change if he learned that E had been complaining about her
    shoulder injury since the date of the accident. Thereafter, without
    informing or obtaining the consent of L Co., B Co. sent E’s deposition
    transcripts, in which she indicated that she had been complaining about
    her shoulder pain since the date of the accident, to D and set up an
    appointment for D to perform a medical examination of E. Prior to the
    examination, B Co. filed a disclosure indicating that it intended to call
    D as an expert witness at trial to testify that, contrary to his earlier
    opinion, D believed that E’s shoulder injury was a direct result of the
    motor vehicle accident. Following the medical examination, D prepared
    a report to that effect. Thereafter, the trial court granted L Co.’s motion
    for expenses, requiring B Co. to reimburse L Co. for all expenses it had
    paid to D for his expert services. Held that the trial court’s order of
    sanctions must be reversed because our rules of practice do not clearly
    prohibit ex parte communications between an attorney and an expert
    who previously had been disclosed by the opposing party as a potential
    trial witness: pursuant to our Supreme Court’s decision in Millbrook
    Owners Assn., Inc. v. Hamilton Standard (
    257 Conn. 1
    ), for a trial
    court’s order of sanctions for a violation of a discovery order or rule
    to withstand scrutiny, the order or rule to be complied with must be
    reasonably clear, and the applicable rule of practice (§ 13-4) in the
    present case does not include language that explicitly prohibits ex parte
    communications with experts who have been disclosed by an opposing
    party; moreover, the trial court’s holding that B Co.’s ex parte communi-
    cations with D were implicitly forbidden because they were not explicitly
    permitted by Practice Book § 13-4 was predicated on outdated authori-
    ties that analyzed a pre-1993 version of rule 26 (b) (4) of the Federal
    Rules of Civil Procedure, which the trial court claimed mirrored Practice
    Book § 13-4 and provided the exclusive means for conducting discovery
    of expert witnesses, however, the exclusivity language of the pre-1993
    version of rule 26 (b) (4) is not included in the current version of the
    rule or in the current version of Practice Book § 13-4; furthermore,
    Practice Book § 13-4 (e), which establishes a procedure by which a
    party can adopt and make use of an expert already disclosed by another
    party, implicitly suggests that some sort of communication may be
    required between opposing counsel and a disclosed expert to satisfy
    the disclosure requirements of that subsection; accordingly, the trial
    court’s justification for the order of sanctions, which was based on its
    finding that B Co.’s conduct with respect to D was wrongful, was clearly
    erroneous.
    Argued February 8—officially released May 31, 2022
    Procedural History
    Writ of error from an order of the Superior Court in
    the judicial district of Middlesex, Frechette, J., granting
    a motion for sanctions filed by the defendant in error,
    brought to the Supreme Court, which transferred the
    matter to this court. Reversed; judgment directed.
    Mario Cerame, with whom, on the brief, was Timo-
    thy Brignole, for the appellant (plaintiff in error Brig-
    nole, Bush & Lewis, LLC).
    Thomas P. Mullaney III, for the appellee (defendant
    in error Liberty Mutual Insurance Company).
    Opinion
    SHELDON, J. This case comes before the court on
    a writ of error brought by the plaintiff in error1 Brignole,
    Bush & Lewis, LLC, the law firm representing the plain-
    tiff, Jacqueline Epright, in the underlying action to
    recover underinsured motorist benefits from the defen-
    dant in error, Liberty Mutual Insurance Company, in
    connection with a motor vehicle accident. The plaintiff
    in error seeks review of the trial court’s order granting
    a motion for sanctions, which the defendant in error
    filed against it in the underlying action as a motion for
    expenses, pursuant to which the plaintiff in error has
    been ordered to pay the defendant in error all costs
    related to the defendant in error’s retention of James
    W. Depuy, an expert first disclosed by the defendant
    in error as a potential trial witness in the underlying case
    to dispute the causal connection between the motor
    vehicle accident and one of Epright’s principal claims
    of injury. The court based its challenged sanctions order
    upon a finding that the plaintiff in error had had imper-
    missible ex parte communications with Depuy after the
    defendant in error disclosed him as a testifying expert,
    in what the court found to have been a clear violation
    of the rules of expert discovery set forth in Practice
    Book § 13-4.
    In its writ of error, the plaintiff in error claims that the
    sanctions order issued by the trial court was improper
    because, among other things, (1) the plaintiff in error
    complied with the rules of practice governing the disclo-
    sure of expert witnesses, (2) no rule of practice prohib-
    ited the ex parte communications here at issue, and (3)
    the prerequisites necessary to justify imposition of a
    discovery sanction were not satisfied in this instance.
    The plaintiff in error also argues that, to the extent the
    rules of practice are interpreted to prohibit the ex parte
    communications in question, the rules are unconstitu-
    tionally vague because they fail to provide adequate
    notice that such communications are prohibited.2 Because
    we conclude that our rules of practice do not clearly
    prohibit ex parte communications between an attorney
    for a party and a testifying expert witness previously
    disclosed by an opposing party, the order of sanctions
    in this case cannot stand.3 Accordingly, we reverse the
    judgment of the trial court.
    We begin by setting forth the relevant facts, as found
    by the trial court, in addition to the procedural history
    of the present dispute. The plaintiff in the underlying
    action, Epright, filed suit to recover underinsured motor-
    ist benefits under her insurance policy with the defen-
    dant in error in connection with a rear-end motor vehi-
    cle collision that occurred on December 14, 2012.
    Epright allegedly sustained various injuries as a result
    of this accident, including an injury to her left shoulder,
    which she claims to have resulted in multiple surgeries.
    On August 30, 2017, the defendant in error filed a disclo-
    sure pursuant to Practice Book § 13-4, which identified
    Depuy as an expert witness who would opine, on the
    basis of his review of Epright’s medical records, that
    the treatment Epright received for her left shoulder was
    not causally related to the motor vehicle accident.
    On January 7, 2019, Attorney Kevin F. Brignole, an
    attorney with the plaintiff in error who represents Epright
    in the underlying action, deposed Depuy at the defen-
    dant in error’s expense. Depuy was emphatic that he
    had reviewed all of Epright’s medical records and that
    there was no indication in them that Epright had com-
    plained of any shoulder pain until well after the acci-
    dent. He thus opined that Epright’s shoulder injury was
    unrelated to the accident. Depuy was then asked by
    Kevin Brignole whether it would change his opinion on
    the issue of causation if he learned that Epright had
    been complaining about shoulder pain since the date
    of the accident. Depuy testified that if that were the
    case, then his opinion might, indeed, be different. Depuy
    was then asked if he had been provided with copies of
    Epright’s deposition transcripts prior to rendering his
    opinion, and he replied that he had not. Epright had
    testified at her deposition that she had been complain-
    ing about shoulder pain ever since the date of the acci-
    dent.
    On January 22, 2019, without informing or obtaining
    consent from counsel for the defendant in error, Attor-
    ney Timothy Brignole, another attorney with the plain-
    tiff in error, instructed his paralegal, Sandra Bryant, to
    contact Depuy’s office to set up an appointment for
    Depuy to perform a medical examination of Epright for
    a fee. Timothy Brignole was within earshot of Bryant
    when she spoke with Depuy’s secretary, who scheduled
    the medical examination for February 12, 2019. ‘‘Imme-
    diately following this discussion, [Kevin] Brignole filed
    a lengthy and detailed disclosure,’’ indicating that
    Epright intended to call Depuy as an expert witness at
    trial (January 22 disclosure). Timothy Brignole then
    sent this disclosure to the general e-filing address of
    the law firm representing the defendant in error. The
    January 22 disclosure stated, among other things, that,
    upon information and belief, Depuy would testify that,
    contrary to his earlier opinion, he believed that Epright’s
    shoulder injury was a direct result of the motor vehicle
    accident. In a letter to Depuy dated January 22, 2019,
    Timothy Brignole memorialized the scheduling of the
    examination and reiterated his intention to pay Depuy
    a fee for the examination.4 Along with the letter, he
    enclosed Epright’s deposition transcripts.5 Prior to the
    January 22 disclosure, the plaintiff in error made no
    attempt to reach an agreement with or to inform counsel
    for the defendant in error about having Depuy consider
    Epright’s deposition transcripts or having him examine
    her as possible bases for reconsidering his previously
    disclosed expert opinion concerning the causation of
    Epright’s shoulder injury.
    Depuy conducted the medical examination of Epright
    on March 5, 2019. The plaintiff in error never informed
    the defendant in error that the examination, which was
    originally scheduled for February 12, 2019, had been
    rescheduled for March 5, 2019. On March 6, 2019, Kevin
    Brignole sent the defendant in error a medical examina-
    tion report prepared by Depuy. The report stated that,
    on the basis of his discussion with and examination of
    Epright, Depuy had come to believe that the shoulder
    injury of which she was complaining of in the underlying
    action was causally related to her December 14, 2012
    accident.
    On March 8, 2019, the defendant in error filed a motion
    for order to show cause, requesting that the court issue
    a summons and order to Depuy and his employer, Ortho-
    Connecticut/Danbury Orthopedics, requiring them to
    appear at a hearing before the court to demonstrate
    why its attached prayer for injunction and disgorgement
    should not be granted. In its prayer for injunction and
    disgorgement, the defendant in error sought to enjoin
    Depuy from giving any testimony in the underlying action,
    to enjoin and prohibit any use of his March 5, 2019
    medical examination report at trial, and to require
    Depuy to disgorge all sums it had paid to him for his
    expert services in the underlying action.
    On March 14, 2019, construing the motion for order
    to show cause as ‘‘a motion to preclude/motion to dis-
    qualify’’ Depuy, the court ordered that a hearing on the
    motion be held on April 4, 2019, and permitted counsel
    for the defendant in error to subpoena Depuy to appear
    at the hearing and produce his file in this matter. On
    March 21, 2019, the plaintiff in error, on behalf of
    Epright, filed an objection to the defendant in error’s
    request that Depuy be precluded from testifying in the
    action, arguing, inter alia, that neither Connecticut case
    law nor Connecticut’s rules of practice limit or prohibit
    a plaintiff from disclosing, as the plaintiff’s own expert,
    an individual who previously was named by a defendant
    as a testifying expert. Furthermore, it argued that there
    is no authority in Connecticut requiring counsel for the
    plaintiff to seek any waiver, stipulation or permission
    from counsel for the defendant before having direct
    contact with a testifying expert whom the defendant
    has disclosed, especially when the plaintiff has dis-
    closed that she too may call the expert to testify as her
    own expert witness at trial. On April 18, 2019, both the
    plaintiff in error, on behalf of Epright, and the defendant
    in error, on its own behalf, filed posthearing briefs.
    In a memorandum of decision dated June 18, 2019,
    the trial court, Frechette, J., granted the defendant in
    error’s motion to disqualify Depuy. As its basis for so
    doing, the court stated that the conduct of the plaintiff
    in error constituted ‘‘a clear violation of Practice Book
    § 13-4.’’ The primary basis for the court’s conclusion to
    that effect was that the plaintiff in error had contacted
    Depuy ‘‘ex parte, imparted information to him, set up
    an appointment for him to conduct an examination of
    [Epright], and offered him remuneration . . . .’’ The
    court further found that the January 22 disclosure was
    noncompliant with § 13-4 (e), a provision that explicitly
    authorizes parties in civil cases, inter alia, to adopt ‘‘all
    or a specified part of the expert disclosure already
    on file,’’ because ‘‘the disclosure already filed by the
    defendant [in error with respect to Depuy] contained
    an opinion that was unambiguously unfavorable to
    [Epright], and the . . . January 22 disclosure refer-
    ences a future examination and an opinion favorable
    to [Epright]. Thus, it is clear that the January 22 disclo-
    sure is not an adoption of the [defendant in error’s]
    disclosure of Dr. Depuy’s expert opinion under . . .
    § 13-4 (e).’’6 (Emphasis omitted.)
    The court then stated that our rules of practice ‘‘do
    not authorize, and thus implicitly forbid, counsel from
    making ex parte contact with the opposing party’s dis-
    closed expert.’’ The court indicated that the plaintiff in
    error’s contact with Depuy was ‘‘especially egregious’’
    because ‘‘he was a currently disclosed expert for the
    opposing party, and the contact resulted in him ‘switch-
    ing sides’ of the litigation close in time to the commence-
    ment of trial.’’ The court stated: ‘‘To reiterate the obvi-
    ous: parties and their attorneys are allowed to, and
    routinely do, hire and disclose expert witnesses in order
    to present their side of the case. As part of this, counsel
    need to be able to have candid discussions with their
    experts, and be allowed to cogently present their side
    of the case through the disclosed expert. Our Practice
    Book rules provide the means for obtaining information
    about the other side’s expert, via interrogatories and
    depositions. These rules do not permit ex parte contact
    with the other side’s experts. In the case at bar, [Epright]
    had, indeed, already disclosed two of her own experts.
    Severing the contact between the defendant [in error]
    and its only expert is prejudicial to the defendant [in
    error] because it was relying upon Dr. Depuy’s testi-
    mony in the impending trial. If this court were to con-
    done the [plaintiff in error’s] behavior, it would encour-
    age circumvention of Connecticut’s mandatory discovery
    rules. . . . In addition, the defendant [in error] would
    be prevented from presenting the evidence at trial in a
    way that fits its story of the case, which it has a right
    to do.’’ (Citation omitted; emphasis omitted; footnote
    omitted.) In sum, the court concluded that ‘‘there were
    plenty of alternative, appropriate courses of action
    available to [the plaintiff in error]’’; however, none was
    taken.7 On that basis, it granted the defendant in error’s
    motion to disqualify Depuy.8 In addition, it indicated in
    its ruling that the defendant in error could file a motion
    to recover any fees or costs related to this motion to
    preclude or any other expenses it had incurred as a
    result of the actions of the plaintiff in error.9
    On July 24, 2019, the defendant in error filed a motion
    for expenses requesting that the court order the plaintiff
    in error to reimburse it for all fees, costs, and expenses
    related to Depuy. Attached to the motion was an affida-
    vit that set forth the value of the legal services that the
    defendant in error’s counsel had rendered in connection
    with this dispute as to Depuy ($16,732.50), in addition to
    the amount the defendant in error had paid for Depuy’s
    expert services up until that point ($12,895).
    On January 2, 2020, the court issued its ruling on the
    defendant in error’s motion for expenses, drawing upon
    much of its discussion in its earlier memorandum of
    decision that ordered Depuy’s preclusion.10 The court
    stated that, although there was ‘‘no Connecticut author-
    ity directly dealing with this issue,’’ this was likely so
    ‘‘because so few attorneys would engage in direct ex
    parte contact with an opponent’s expert.’’ The court
    further stated: ‘‘[The plaintiff in error] still maintains,
    without citing any legal authority, that he is allowed to
    engage in ex parte contact with his opponent’s expert.
    This is a disturbing position for counsel to take, and in
    the case at bar, has resulted in the wrongful disruption
    of the court’s docket and significant costs to the defen-
    dant [in error]. [The plaintiff in error] seems to suggest
    that [it] is somehow defending the rights of the plain-
    tiff’s bar in taking this position. This is also a curious
    position: do plaintiffs not hire experts to help present
    their cases? Do counsel for plaintiffs want counsel for
    defense to engage in ex parte contact with experts
    retained (and paid) by them? To state the obvious, nei-
    ther party—plaintiff or defendant—[is] permitted to
    directly engage in ex parte discussions with their oppo-
    nent’s expert. We have, like every other jurisdiction,
    clear and explicit rules regarding the obtaining of infor-
    mation from the other side’s expert: they are known as
    rules of discovery. Every lawyer knows (or should
    know) what the rules are regarding the obtaining of
    information from an opponent’s expert.’’
    The court then concluded that the requirements for
    sanctions under our case law were satisfied. Citing to
    Millbrook Owners Assn., Inc. v. Hamilton Standard,
    
    257 Conn. 1
    , 17–18, 
    776 A.2d 1115
     (2001),11 the court
    concluded that Practice Book ‘‘§ 13-4 is clear,’’ it ‘‘was
    violated,’’ and the ‘‘preclusion of expert testimony and
    related attorney’s fees are proportional to the noncom-
    pliance at issue.’’ The court found that the plaintiff in
    error’s improper ex parte communication had caused
    the defendant in error ‘‘to lose the [defendant in error’s]
    disclosed expert.’’ The court further stated: ‘‘This action
    by [the plaintiff in error] (1) caused a delay in the
    imminently scheduled trial (which irretrievably dis-
    rupted the court’s docket); (2) caused the defendant
    [in error] to incur costs in the fees already paid to its
    expert; and (3) caused the defendant [in error] to now
    have to hire a new expert so that the defendant [in
    error] could properly defend this case.’’ The court then
    ordered the plaintiff in error to pay the defendant in
    error the sum of $12,895, which represented and was
    intended to compensate the defendant in error for all
    expenses it had paid to Depuy for his expert services.
    The court, however, did not order the plaintiff in error
    to pay the defendant in error’s attorney’s fees associated
    with this dispute. This writ of error followed. Additional
    facts will be set forth as necessary.
    We begin by setting forth the legal principles regard-
    ing a trial court’s power to sanction a party or attorney.
    A trial court’s authority to impose sanctions comes from
    various sources. One such source is ‘‘our rules of prac-
    tice, adopted by the judges of the Superior Court in the
    exercise of their inherent rule-making authority . . . .’’
    Wyszomierski v. Siracusa, 
    290 Conn. 225
    , 234, 
    963 A.2d 943
     (2009). With respect to disclosures and discovery
    of expert witnesses in civil matters, Practice Book § 13-
    4 (h) provides in relevant part that ‘‘[a] judicial authority
    may, after a hearing, impose sanctions on a party for
    failure to comply with the requirements of this sec-
    tion. . . .’’12
    In addition to the foregoing rule, our Supreme Court
    has ‘‘long recognized that, apart from a specific rule of
    practice authorizing a sanction, ‘the trial court has the
    inherent power to provide for the imposition of reason-
    able sanctions, to compel the observance of its rules.’ ’’
    Millbrook Owners Assn., Inc. v. Hamilton Standard,
    supra, 
    257 Conn. 9
    . Subject to certain limitations, our
    trial courts may impose sanctions against attorneys and
    their clients ‘‘for a course of claimed dilatory, bad faith
    and harassing litigation conduct, even in the absence
    of a specific rule or order of the court that is claimed
    to have been violated.’’ (Internal quotation marks omit-
    ted.) CFM of Connecticut, Inc. v. Chowdhury, 
    239 Conn. 375
    , 393, 
    685 A.2d 1108
     (1996), overruled in part on other
    grounds by State v. Salmon, 
    250 Conn. 147
    , 154–55, 
    735 A.2d 333
     (1999). ‘‘[B]efore imposing any such sanctions,
    the court must afford the sanctioned party or attorney
    a proper hearing on the . . . motion for sanctions.
    . . . There must be fair notice and an opportunity for
    a hearing on the record.’’ (Citation omitted; internal
    quotation marks omitted.) Maris v. McGrath, 
    269 Conn. 834
    , 844, 
    850 A.2d 133
     (2004).
    In order for a trial court’s order of sanctions for
    a violation of a discovery order or rule to withstand
    scrutiny, three requirements must be met. ‘‘First, the
    order to be complied with must be reasonably clear.
    In this connection, however, we also state that even an
    order that does not meet this standard may form the
    basis of a sanction if the record establishes that, not-
    withstanding the lack of such clarity, the party sanc-
    tioned in fact understood the trial court’s intended
    meaning. This requirement poses a legal question that
    we will review de novo. Second, the record must estab-
    lish that the order was in fact violated. This requirement
    poses a question of fact that we will review using a
    clearly erroneous standard of review. Third, the sanc-
    tion imposed must be proportional to the violation. This
    requirement poses a question of the discretion of the
    trial court that we will review for abuse of that discre-
    tion.’’ (Internal quotation marks omitted.) Menna v. Jai-
    man, 
    80 Conn. App. 131
    , 135, 
    832 A.2d 1219
     (2003); see
    also Millbrook Owners Assn., Inc. v. Hamilton Stan-
    dard, supra, 
    257 Conn. 17
    –18.
    Under these authorities, the question we must first
    address in reviewing the appropriateness of the sanc-
    tion here at issue is whether Practice Book § 13-4 is
    ‘‘reasonably clear’’ in alerting attorneys that they may
    not have ex parte communications with experts who
    have been disclosed by their opponents as potential
    witnesses at trial. The trial court did not identify a
    particular portion of the rule that was violated; rather,
    it concluded that our ‘‘rules require the attorney seeking
    information from, or contact with, an opponent’s expert,
    to follow the Practice Book rules of discovery, and
    obtain the information sought through those rules, not
    outside them.’’ It reasoned that our ‘‘rules do not autho-
    rize, and thus implicitly forbid, counsel from making
    ex parte contact with the opposing party’s disclosed
    expert.’’
    We must therefore turn our attention to Practice
    Book § 13-4. In our review of that rule, we have found no
    explicit prohibition regarding ex parte communications
    with experts who have been disclosed by an opposing
    party as potential witnesses at trial. To that end, we
    note that in other provisions of our rules of practice
    where the judges of the Superior Court intended to
    limit a lawyer’s ex parte communications, they have
    explicitly said so. See Rules of Professional Conduct
    3.5 (‘‘[a] lawyer shall not: (1) Seek to influence a judge,
    juror, prospective juror or other official by means pro-
    hibited by law; (2) Communicate ex parte with such a
    person during the proceeding unless authorized to do
    so by law or court order’’ (emphasis added)); Rules of
    Professional Conduct 4.2 (‘‘[i]n representing a client, a
    lawyer shall not communicate about the subject of the
    representation with a party the lawyer knows to be
    represented by another lawyer in the matter, unless
    the lawyer has the consent of the other lawyer or is
    authorized by law to do so’’). No such language, how-
    ever, appears in Practice Book § 13-4.
    In the absence of explicit language in Practice Book
    § 13-4 prohibiting ex parte communications by counsel
    with experts who have been disclosed by their oppo-
    nents as possible trial witnesses, we must look more
    broadly at § 13-4 to determine whether it, as the trial
    court concluded, otherwise implicitly prohibits such ex
    parte communications, and, if so, whether it is ‘‘reason-
    ably clear’’ in alerting attorneys to that prohibition. On
    the basis of our review of the rule, we cannot so con-
    clude.
    The trial court appears to have held that the plaintiff
    in error clearly violated Practice Book § 13-4 because
    the ex parte communications in this case fell outside
    of the prescribed formal discovery procedures set forth
    therein and were, therefore, forbidden by our rules. In
    arriving at this conclusion, the court cited to a 1993
    formal opinion of the American Bar Association’s Com-
    mittee on Ethics and Professional Responsibility (ABA
    Committee), Formal Opinion 93-378, titled ‘‘Ex Parte
    Contacts with Expert Witnesses.’’ See A.B.A. Commit-
    tee on Ethics and Professional Responsibility, Formal
    and Informal Ethics Opinions 1983–1998 (2000) p. 213.
    In that formal opinion, the ABA Committee opined that,
    ‘‘[a]lthough the [American Bar Association’s] Model
    Rules [of Professional Conduct] do not explicitly pro-
    hibit ex parte contacts with an opposing party’s expert
    witness, a lawyer who engages in such contacts may
    violate Model Rule 3.4 (c)13 if the matter is pending in
    federal court or in a jurisdiction that has adopted an
    expert-discovery rule patterned after Federal Rule of
    Civil Procedure 26 (b) (4) (A).’’ (Emphasis added; foot-
    note added). Id. In reaching that conclusion, the ABA
    Committee cited to two decisions on the issue from the
    U.S. Court of Appeals for the Ninth Circuit, which had
    held that ex parte communications with the opposing
    party’s expert witness constituted violations of the fed-
    eral discovery rules then in effect. Id., p. 215; see Ameri-
    can Protection Ins. Co. v. MGM Grand Hotel-Las Vegas,
    Inc., 
    748 F.2d 1293
     (9th Cir. 1984), withdrawn by Ameri-
    can Protection Ins. Co. v. MGM Grand Hotel-Las Vegas,
    Inc., 
    765 F.2d 925
    , 926 (9th Cir. 1985); Campbell Indus-
    tries v. M/V Gemini, 
    619 F.2d 24
     (9th Cir. 1980). Relying
    on these authorities, the trial court in the present case
    stated that, because Practice Book § 13-4 is a ‘‘ ‘mirror
    image’ ’’ of rule 26 (b) (4) of the Federal Rules of Civil
    Procedure, which, in the court’s view, provides ‘‘spe-
    cific, mandatory and exclusive procedures’’ for the con-
    duct of expert discovery, it is clear that our ‘‘rules do
    not authorize, and thus implicitly forbid, counsel from
    making ex parte contact with the opposing party’s dis-
    closed expert.’’
    Our reading of Practice Book § 13-4 mandates a dif-
    ferent conclusion. As an initial matter, it appears that
    the trial court’s ruling is predicated on outdated authori-
    ties. To be sure, the court relies almost exclusively on
    the ABA Committee’s 1993 formal opinion (and the
    cases cited therein), which in turn was based on a pre-
    1993 version of rule 26 (b) (4) of the Federal Rules of
    Civil Procedure. The pre-1993 version of the federal
    rule contained language expressly providing that the
    rule set forth therein described the exclusive means
    by which a party could obtain discovery from expert
    witnesses. See Fed. R. Civ. P. 26 (b) (4) (1992) (‘‘[d]is-
    covery of facts known and opinions held by experts,
    otherwise discoverable under the provisions of subdivi-
    sion (b) (1) of this rule and acquired or developed in
    anticipation of litigation or for trial, may be obtained
    only as follows’’ (emphasis added)); see also Campbell
    Industries v. M/V Gemini, 
    supra,
     
    619 F.2d 26
     n.1 (citing
    pre-1993 federal expert discovery rule). Because the
    rules at that time provided the exclusive means for
    conducting discovery of expert witnesses, some courts
    reasoned that ex parte communications were prohib-
    ited because they fell outside the prescribed methods
    for discovery. See Erickson v. Newmar Corp., 
    87 F.3d 298
    , 301 (9th Cir. 1996) (‘‘[a]t the time of the present
    litigation, Federal Rule of Civil Procedure 26 (b) (4)
    provided that a lawyer’s permissible contact with an
    opposing party’s expert was limited to interrogatories
    and, upon leave of the court, depositions’’). In 1993,
    however, rule 26 (b) (4) was amended, inter alia, by
    removing therefrom the phrase ‘‘[d]iscovery . . . may
    be obtained only as follows . . . .’’ Accordingly, the
    current form of rule 26 (b) (4) contains none of the
    limiting language that was previously set forth in the
    rule upon which the ABA Committee relied in its 1993
    formal opinion.
    Furthermore, and of particular importance here,
    although previous versions of Practice Book § 13-4, like
    previous versions of rule 26 (b) (4) of the Federal Rules
    of Civil Procedure, contained limiting language regard-
    ing expert discovery, that limiting language was elimi-
    nated from Practice Book § 13-4 in 2009 when major
    revisions to the rule took effect. Practice Book (2009)
    § 13-4, history. Before that time, the expert witness
    provision of our rules of practice provided in relevant
    part: ‘‘Discovery of facts known and opinions held by
    experts, otherwise discoverable under the provisions
    of Section 13-2 and acquired or developed in anticipa-
    tion of litigation or for trial, may be obtained only as
    follows . . . .’’ (Emphasis added.) Practice Book
    (2008) § 13-4. Beginning in 2009, however, such lan-
    guage was eliminated from § 13-4 and additional
    changes were made. See Practice Book (2009) § 13-4.
    Although courts interpreting expert discovery rules
    premised on the pre-1993 federal rules and the pre-2009
    Connecticut rules might have had some textual support
    for their conclusion that ex parte communications with
    experts disclosed by their opponents as potential wit-
    nesses at trial were prohibited because the rules pre-
    scribed the exclusive means for obtaining expert dis-
    covery, we have not found any language in our current
    rules that would allow us to interpret them in this man-
    ner.
    We thus find unsupportable the court’s holding, predi-
    cated on the ABA Committee’s 1993 formal opinion,
    that, because ex parte communications with a disclosed
    expert are not expressly permitted by Practice Book
    § 13-4, such communications must implicitly be forbid-
    den. Although, to reiterate, the trial court’s analysis may
    have been reasonable under earlier versions of our rules,
    we have found no support for such a limited reading in
    our current rules.
    Another way in which Practice Book § 13-4 differs
    from the federal rules of expert discovery is its inclusion
    of § 13-4 (e),14 which explicitly establishes a procedure
    by which a party can adopt and make use of an expert
    already disclosed by another party. It provides that in
    a party’s notice of disclosure for an expert who was
    previously disclosed as a testifying expert by another
    party, a party shall adopt all or a specified part of the
    other party’s disclosure and shall disclose ‘‘other expert
    opinions to which the witness is expected to testify
    and the substance of the grounds for any such expert
    opinion.’’ Practice Book § 13-4 (e). This provision does
    not expressly or implicitly prohibit ex parte communi-
    cations between the lawyer making the disclosure pur-
    suant to § 13-4 and the expert so disclosed. See Practice
    Book § 13-4 (e). To the contrary, it implicitly suggests
    that some sort of communication may be required
    between the opposing counsel and the previously dis-
    closed expert in order to facilitate the disclosure
    required by § 13-4 (e), particularly because that provi-
    sion requires an attorney to disclose any other opinions
    to which the expert is expected to testify and the
    grounds therefor, which may be quite different, both
    in their nature and in the expert’s reasons for holding
    them, from all other opinions and the grounds support-
    ing them that the opposing party previously disclosed.
    Counsel cannot ethically make an expert disclosure
    under Practice Book § 13-4 based upon mere guess-
    work, and so he or she must somehow ascertain the
    nature and substance of an expert’s opinions before
    filing the disclosure.15 See Rules of Professional Con-
    duct 3.1 (‘‘[a] lawyer shall not bring or defend a proceed-
    ing, or assert or controvert an issue therein, unless
    there is a basis in law and fact for doing so that is not
    frivolous, which includes a good faith argument for an
    extension, modification or reversal of existing law’’);
    Rules of Professional Conduct 3.3 (‘‘[a] lawyer shall not
    knowingly: (1) Make a false statement of fact or law to
    a tribunal or fail to correct a false statement of material
    fact or law previously made to the tribunal by the law-
    yer’’).
    At bottom, we cannot conclude that Practice Book
    § 13-4 is ‘‘reasonably clear’’ in alerting attorneys that
    they are prohibited from having ex parte communica-
    tions with experts who have been disclosed by their
    opponents as possible trial witnesses. We also have
    found no case law in this state that makes it reasonably
    clear that such conduct is prohibited. Indeed, the trial
    court itself recognized that there was ‘‘no Connecticut
    authority directly dealing with this issue . . . .’’ Attor-
    neys practicing in Connecticut courts must be able to
    consult our rules and be able to rely upon them to
    clearly define appropriate and inappropriate conduct.
    We have no occasion to take a position on whether
    ex parte communications with an opposing party’s dis-
    closed expert should or should not be permissible; we
    simply hold today that Practice Book § 13-4 does not
    clearly prohibit such conduct.16 Because we cannot con-
    clude that the ex parte communications at issue in this
    case were proscribed by our rules or, thus, that it was
    wrongful to engage in them, the sanction of requiring
    counsel, on the basis of such communications, to pay
    all expenses incurred by his opponent for the services
    of the expert so communicated with cannot stand. Put
    differently, because the ex parte communications at
    issue were not impermissible under § 13-4, the trial
    court’s justification for the sanction in this case based
    on its findings that the plaintiff in error’s conduct was
    ‘‘wrongful’’ and ‘‘caused the defendant [in error] to lose’’
    its disclosed expert is clearly erroneous. (Emphasis
    omitted.) The ‘‘loss’’ of Depuy cannot be said to have
    been caused by wrongful conduct of the plaintiff in
    error. Rather, any ‘‘loss’’ of Depuy must be attributed
    to the plaintiff in error’s questioning of Depuy at a
    deposition, when Depuy testified favorably to the plain-
    tiff in error by stating that if he were presented with
    evidence that Epright had been complaining of shoulder
    pain since the time of the accident (which she had
    testified to at her own deposition prior to the defendant
    in error’s disclosure of Depuy), his opinion as to causal-
    ity might, indeed, be different. The plaintiff in error’s
    subsequent conduct in having its paralegal contact Depuy
    to provide him a more complete body of relevant evi-
    dence (i.e., Epright’s deposition transcripts demonstra-
    ting her persistent complaints of shoulder pain since
    the date of the accident) and providing Depuy with an
    opportunity to do a physical examination of Epright
    (instead of solely reviewing a sampling of medical records
    selected by counsel for the defendant in error) is devoid
    of any indication that the plaintiff in error was thereby
    attempting impermissibly to influence Depuy not to
    testify or to testify falsely.
    In concluding that the ex parte communications in
    this case were improper, the court stated that ‘‘counsel
    need to be able to have candid discussions with their
    experts, and be allowed to cogently present their side
    of the case through the disclosed expert.’’ (Emphasis
    in original.) The court reasoned that if it were to con-
    done the ex parte communications at issue, ‘‘the defen-
    dant [in error] would be prevented from presenting the
    evidence at trial in a way that fits its story of the case,
    which it has a right to do.’’
    The court’s rationale, however, fails to recognize two
    important points. First, ‘‘no party to litigation has any-
    thing resembling a proprietary right to any witness’s
    evidence. Absent a privilege, no party is entitled to
    restrict an opponent’s access to a witness, however
    partial or important to him, by insisting upon some
    notion of allegiance.’’17 Doe v. Eli Lilly & Co., 
    99 F.R.D. 126
    , 128 (D.D.C. 1983); see 
    id.
     (‘‘[e]ven an expert whose
    knowledge has been purchased cannot be silenced by
    the party who is paying him on that ground alone’’). As
    this court has stated, ‘‘[t]here is no justification for a
    ‘rule that would wholly exempt experts from placing
    before a tribunal factual knowledge relating to the case
    in hand [or] opinions already formulated . . . .’ ’’ Lane
    v. Stewart, 
    46 Conn. App. 172
    , 176, 
    698 A.2d 929
    , cert.
    denied, 
    243 Conn. 940
    , 
    702 A.2d 645
     (1997); see also
    Thomaston v. Ives, 
    156 Conn. 166
    , 167, 173–74, 
    239 A.2d 515
     (1968) (landowner in eminent domain proceeding
    may require appraiser hired by state, whom state did not
    call, to testify concerning valuation of land); Loiseau
    v. Board of Tax Revenue, 
    46 Conn. App. 338
    , 345, 
    699 A.2d 265
     (1997) (‘‘[t]hat the plaintiffs might have the
    opportunity to cross-examine a defense expert does not
    provide fair access if the defendant chooses not to call
    the expert as a witness’’).
    Second, once an expert is disclosed, the status of
    that expert changes. Prior to the disclosure, the expert
    likely served as a consultant to the attorney who, thus,
    in the absence of exceptional circumstances, was a
    person about whom the other party had no right to
    demand information through discovery. See Practice
    Book § 13-4 (f).18 In the absence of exceptional circum-
    stances, the attorney can prevent his or her opponent
    from acquiring information about a consulting expert
    simply by refraining from disclosing him or her as a
    person who might testify at trial. See Practice Book
    § 13-4 (f). The rule is intended to allow litigants to
    consult experts in order to evaluate a claim ‘‘without
    fear that every consultation with an expert may yield
    grist for the adversary’s mill.’’ Rubel v. Eli Lilly & Co.,
    
    160 F.R.D. 458
    , 460 (S.D.N.Y. 1995); see also Petterson
    v. Superior Court of Merced County, 
    39 Cal. App. 3d 267
    , 273, 
    114 Cal. Rptr. 20
     (1974) (explaining that rule
    precluding discovery of consultative experts is ‘‘a shield
    to prevent a litigant from taking undue advantage of
    his adversary’s industry and effort, not a sword to be
    used to thwart justice’’).
    Following an expert disclosure, however, a transfor-
    mation occurs. By making the disclosure, the attorney
    essentially certifies to the court and the opposing party
    that the expert is no longer a consultant but someone
    who has relevant ‘‘scientific, technical or other special-
    ized knowledge’’ that can ‘‘assist the trier of fact in
    understanding the evidence or in determining a fact in
    issue.’’ Conn. Code Evidence § 7-2; see Lane v. Stewart,
    supra, 
    46 Conn. App. 177
     (‘‘[b]y disclosing the witness,
    the defendant made it possible for the plaintiffs to dis-
    cover evidence that the plaintiffs decided was beneficial
    to their case and should be brought before the trier of
    fact’’). Because a disclosed expert has been identified
    as someone who can help the fact finder ascertain the
    truth in the matter, the opposing party is permitted to
    acquire information about the expert in connection with
    his or her opinions, even if some of that information
    may be helpful to the opposing party’s case. This, in
    fact, is why our rules allow depositions of expert wit-
    nesses; see Practice Book § 13-4 (c); and require that the
    disclosing party, in the absence of certain exceptions,
    ‘‘produce to all other parties all materials obtained,
    created and/or relied upon by the expert in connection
    with his or her opinions in the case . . . .’’ Practice
    Book § 13-4 (b) (3). Such materials logically and neces-
    sarily include all communications between the expert
    and the attorney who hired him concerning the case,
    including communications from the attorney to the
    expert as to his theory of the case and his hopes or
    expectations as to the nature and substance of the
    expert’s opinions about the case. See, e.g., In re Pioneer
    Hi-Bred International, Inc., 
    238 F.3d 1370
    , 1375 (Fed.
    Cir. 2001) (The federal expert witness discovery rule
    ‘‘proceeds on the assumption that fundamental fairness
    requires disclosure of all information supplied to a testi-
    fying expert in connection with his testimony. Indeed,
    we are quite unable to perceive what interests would
    be served by permitting counsel to provide core work
    product to a testifying expert and then to deny discovery
    of such material to the opposing party.’’).
    It inevitably follows that once a party has had a
    chance to acquire information about an opposing par-
    ty’s disclosed expert, such party may wish to present
    that expert’s testimony at trial, especially if that expert
    agrees with that party on one or more issues in dispute.
    Our rules of practice contemplate this. As previously
    explained, Practice Book § 13-4 (e) establishes a proce-
    dure by which a party can adopt and make use of an
    expert already disclosed by another party. The party
    must file a disclosure that states that it is adopting the
    prior disclosure in whole or in part, and, to the extent
    the expert is making a new opinion, the party must
    disclose the ‘‘other expert opinions to which the witness
    is expected to testify and the substance of the grounds
    for any such expert opinion. . . .’’ Practice Book § 13-
    4 (e).
    Our decision in Lane v. Stewart, supra, 
    46 Conn. App. 177
    , further highlights the significance of an expert
    disclosure. In Lane, a personal injury action, the defen-
    dant retained and disclosed an expert witness who was
    deposed by the plaintiffs. 
    Id.,
     174–75. Soon thereafter,
    the defendant, for tactical reasons, decided not to call
    its expert at trial and sought to quash the subpoena
    duces tecum served on its expert by the plaintiffs. 
    Id.,
    175–76. The trial court in that case granted the motion
    to quash, but this court held that the granting of the
    motion to quash was an abuse of discretion. Id., 175,
    177. This court reasoned that, ‘‘[b]y disclosing the wit-
    ness, the defendant made it possible for the plaintiffs
    to discover evidence that the plaintiffs decided was
    beneficial to their case and should be brought before
    the trier of fact. To allow the defendant to prevent this
    witness from testifying may have deprived the trier of
    fact of material and relevant information that would
    have assisted it in reaching a decision in the case.’’ Id.,
    177. We thus held that, ‘‘where one party has disclosed
    an expert witness pursuant to Practice Book § 220 (D)
    [now Practice Book § 13-4], and that expert witness
    has either been subsequently deposed by the opposing
    party, or the expert’s report has been disclosed pursu-
    ant to discovery, then either party may call that expert
    witness to testify at trial.’’ Id.
    Lane, of course, was decided before the addition of
    Practice Book § 13-4 (e) to our rules of practice, which
    provides an avenue for an opposing party to disclose
    an opponent’s previously disclosed expert witness as
    an expert she also wishes to call at trial. Nevertheless,
    a logical interpretation of § 13-4 (e), in light of Lane,
    is that a party who has complied with the disclosure
    requirements of § 13-4 (e) should generally be permitted
    to call that previously disclosed expert to testify at trial.
    See id. To hold otherwise would deprive ‘‘the trier of
    fact of material and relevant information that would
    have assisted it in reaching a decision in the case.’’ Id.
    The judgment is reversed and the case is remanded
    with direction to render judgment denying the defen-
    dant in error’s motion for sanctions.
    In this opinion the other judges concurred.
    1
    We note that the writ of error also named Timothy Brignole, an attorney
    with Brignole, Bush & Lewis, LLC, as a plaintiff in error.
    2
    We note that the plaintiff in error, on behalf of Epright, filed an interlocu-
    tory appeal simultaneously with its writ of error. The appeal challenged the
    trial court’s order disqualifying Depuy from testifying at trial. See Epright
    v. Liberty Mutual Ins. Co., 
    211 Conn. App. 26
    , 26, 
    271 A.3d 731
     (2022). This
    court dismissed Epright’s appeal for lack of subject matter jurisdiction
    because the challenged interlocutory order is not a final judgment for pur-
    poses of appeal. 
    Id.
    3
    In its briefing before this court, the plaintiff in error also argues that it
    was inappropriate for the court to disqualify Depuy as an expert witness.
    We note that the only issue that we address on this writ of error is the
    appropriateness of the sanction of expenses in the amount of $12,895. This
    is the only claim that the plaintiff in error has standing to raise at this
    juncture. To the extent that the plaintiff in error would like to challenge
    the disqualification of Depuy in the underlying matter, that would be the
    prerogative of its client, Epright, who may file an appeal after there is a
    final judgment in the underlying action. See Epright v. Liberty Mutual Ins.
    Co., 
    211 Conn. App. 26
    , 26, 
    271 A.3d 731
     (2022).
    4
    The trial court noted that ‘‘[t]his correspondence directly contradicts
    the following statement in Attorney [Timothy] Brignole’s affidavit, dated
    March 15, 2019: ‘I have never ever spoken to Dr. Depuy in person, via e-mail,
    via letter, via fax or any other type of communication.’ ’’
    5
    The record discloses that Epright’s deposition was taken on June 21,
    2017, which was approximately two months prior to the defendant in error’s
    disclosure of Depuy as an expert witness and the issuance of Depuy’s
    independent medical record review. Depuy issued two subsequent addenda
    to his medical record review report, one on October 8, 2017, and another
    on November 18, 2018. Neither of these submissions took into consideration
    Epright’s deposition testimony concerning her shoulder injury.
    6
    The full text of Practice Book § 13-4 (e) provides: ‘‘If any party expects
    to call as an expert witness at trial any person previously disclosed by any
    other party under subsection (b) hereof, the newly disclosing party shall
    file a notice of disclosure: (1) stating that the party adopts all or a specified
    part of the expert disclosure already on file; and (2) disclosing any other
    expert opinions to which the witness is expected to testify and the substance
    of the grounds for any such expert opinion. Such notice shall be filed within
    the time parameters set forth in subsection (g).’’
    7
    For example, the court stated that the plaintiff in error ‘‘could have
    cross-examined Dr. Depuy at his deposition using [Epright’s] deposition,
    which Dr. Depuy said he had not read. [The plaintiff in error] could have
    also suspended Dr. Depuy’s deposition until he read [Epright’s] deposition.
    In addition, they could have waited for trial and cross-examined Dr. Depuy,
    on the stand, to elicit the desired information. Or, finally, they could have had
    another expert (they had two disclosed) opine on the same subject matter.’’
    8
    The court explicitly found, however, that the plaintiff in error did not
    violate the Rules of Professional Conduct, to wit, rule 3.4 (3), because
    the court took counsel at their word that they thought their conduct was
    permissible.
    9
    On July 8, 2019, the plaintiff in error, on behalf of Epright, filed a motion
    to reargue and reconsider the defendant in error’s motion to disqualify
    Depuy. The court denied the motion on September 9, 2019, concluding that
    Epright had not presented any additional facts or law that were not raised
    or could have been raised in her original filings.
    10
    In support of its ruling on the motion for expenses, the court incorpo-
    rated by reference the analysis it employed in its previous opinion regarding
    Depuy’s disqualification. The court stated in relevant part: ‘‘While this court
    made no explicit order against hiring opposing counsel’s expert, that action
    goes against common sense and numerous prescribed procedural rules as
    explained in this court’s previous opinion on disqualification.’’
    11
    As discussed in greater detail subsequently in this opinion, Millbrook
    Owners Assn., Inc., sets forth the three part test to determine whether
    sanctions for a violation of a discovery order withstand scrutiny. See Mill-
    brook Owners Assn., Inc. v. Hamilton Standard, supra, 
    257 Conn. 17
    –18.
    12
    Practice Book § 13-4 (h) further provides in relevant part: ‘‘An order
    precluding the testimony of an expert witness may be entered only upon a
    finding that: (1) the sanction of preclusion, including any consequence
    thereof on the sanctioned party’s ability to prosecute or to defend the case,
    is proportional to the noncompliance at issue, and (2) the noncompliance
    at issue cannot adequately be addressed by a less severe sanction or combina-
    tion of sanctions.’’
    13
    At that time, rule 3.4 of the American Bar Association’s Model Rules of
    Professional Conduct provided in relevant part: ‘‘ ‘A lawyer shall not . . .
    (c) knowingly disobey an obligation under the rules of a tribunal except
    for an open refusal based on an assertion that no valid obligation exists
    . . . .’ ’’ (Footnote omitted.) A.B.A. Committee on Ethics and Professional
    Responsibility, supra, p. 213. Rule 3.4 of the Rules of Professional Conduct
    similarly provides in relevant part: ‘‘A lawyer shall not . . . (3) [k]nowingly
    disobey an obligation under the rules of a tribunal except for an open refusal
    based on an assertion that no valid obligation exists . . . .’’
    14
    See footnote 6 of this opinion for the full text.
    15
    Although the precise issue before this court is whether the ex parte
    communication at issue is sanctionable under Practice Book § 13-4, we take
    a moment to address the January 22 disclosure of Depuy. In this disclosure,
    Epright stated, inter alia, that ‘‘[t]he expert ascertained through his review
    of [Epright’s] medical records, review of [Epright’s] deposition testimony
    and independent medical evaluation performed on [Epright] that on Decem-
    ber 14, 2012, she was involved in a motor vehicle accident wherein she
    sustained injuries to her neck and shoulders, as a result of the accident.’’
    Although the plaintiff in error, on the basis of Depuy’s deposition testimony,
    had a good faith basis to believe that Depuy would testify that Epright’s
    injuries were caused by the motor vehicle accident, the plaintiff in error
    should have stated the actual basis for its disclosure and expressed its
    intention of having Depuy review the deposition transcripts and perform a
    medical evaluation, rather than suggesting that a deposition review and
    medical examination had already been conducted.
    16
    That is not to say that there are no ethical restrictions that apply to
    ex parte communications with expert witnesses. For example, the ethical
    restrictions that have been developed for ex parte communications with
    fact witnesses similarly apply to expert witnesses. See, e.g., General Statutes
    § 53a-151 (‘‘[a] person is guilty of tampering with a witness if, believing that
    an official proceeding is pending or about to be instituted, he induces or
    attempts to induce a witness to testify falsely, withhold testimony, elude
    legal process summoning him to testify or absent himself from any official
    proceeding’’); Rules of Professional Conduct 3.4 (‘‘[a] lawyer shall not . . .
    [f]alsify evidence, counsel or assist a witness to testify falsely, or offer an
    inducement to a witness that is prohibited by law’’); Rules of Professional
    Conduct 4.1 (‘‘[i]n the course of representing a client a lawyer shall not
    knowingly: (1) Make a false statement of material fact or law to a third
    person’’); Rules of Professional Conduct 4.2 (generally, attorneys must
    abstain from contact with represented person); Rules of Professional Con-
    duct 4.3 (attorney who is ‘‘dealing on behalf of a client with a person who
    is not represented by counsel . . . shall not state or imply that the lawyer
    is disinterested’’); Rules of Professional Conduct 4.4 (‘‘[i]n representing a
    client, a lawyer shall not use means that have no substantial purpose other
    than to embarrass, delay, or burden a third person, or use methods of
    obtaining evidence that violate the legal rights of such a person’’).
    To the extent the legislature or the judges of the Superior Court in the
    exercise of their inherent rule-making authority do not believe the ethical
    restrictions already in place are sufficient, it is, of course, their prerogative
    to enact a law or rule that clearly prohibits ex parte communications with
    a testifying expert disclosed by another party. At least one state has done
    so. See Idaho R. Civ. P. 26 (b) (4) (v) (‘‘Limitation on Contact With Expert.
    A party must not contact a retained expert disclosed by another party
    pursuant to this Rule without first obtaining the permission of the party
    who retained the expert or by the court.’’).
    17
    As another court aptly put it: ‘‘It would, though, appear that the underly-
    ing factor which causes the courts to treat expert testimony somewhat
    differently from testimony of other witnesses is that the party has an invest-
    ment in the witness. Somehow it is believed that he has bought and paid
    for the witness and that the other party should not share in his property.
    We cannot accept this ‘oath helper’ approach to discovery. It is inconsistent
    with our basic assumption that the trial is a search for truth and not a
    tactical contest which goes to either the richest or to the most resourceful
    litigant.’’ Seven-Up Bottling Co. v. United States, 
    39 F.R.D. 1
    , 2 (D. Colo.
    1966).
    18
    Practice Book § 13-4 (f) provides: ‘‘A party may discover facts known
    or opinions held by an expert who had been retained or specially employed
    by another party in anticipation of litigation or preparation for trial and
    who is not expected to be called as a witness at trial only as provided in
    Section 13-11 or upon a showing of exceptional circumstances under which
    it is impracticable for the party seeking discovery to obtain facts or opinions
    on the same subject by other means.’’