Henning v. Commissioner of Correction ( 2019 )


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    SHAWN HENNING v. COMMISSIONER
    OF CORRECTION
    (SC 20137)
    Robinson, C. J., and Palmer, McDonald, D’Auria,
    Mullins, Kahn and Ecker, Js.
    Syllabus
    The petitioner, who had been convicted of felony murder in connection
    with the stabbing death of the victim inside the victim’s home during
    what appeared to be a botched burglary, sought a writ of habeas corpus,
    claiming, inter alia, that the state deprived him of his due process right
    to a fair trial insofar as it failed to correct the trial testimony of L, a former
    director of the state police forensic laboratory, that a red substance on
    a towel found in the victim’s home after the murder tested positive for
    blood when no such test had been conducted and when subsequent
    testing conducted in connection with the present habeas action revealed
    that the red substance was not in fact blood. The habeas court rendered
    judgment denying the habeas petition. With respect to the petitioner’s
    due process claim, the court concluded that, because L mistakenly but
    honestly believed that the towel tested positive for blood and, thus,
    did not give perjured testimony, the burden was on the petitioner to
    demonstrate that there was a reasonable probability of a different verdict
    if the correct evidence had been disclosed. Applying this standard, the
    habeas court determined that L’s testimony was immaterial because,
    among other things, the state’s criminal case against the petitioner did
    not rely on forensic evidence. Rather, the state proved its case primarily
    on the basis of testimony from witnesses who testified as to certain
    incriminating statements that the petitioner had made to them, testimony
    from neighbors of the victim that they heard a loud vehicle in the vicinity
    around the time of the murder, when the petitioner and his alleged
    accomplice, B, had stolen and were driving a vehicle without a muffler,
    and the testimony of the petitioner’s girlfriend, who contradicted the
    petitioner’s statements to the police regarding his whereabouts on the
    night of the murder. On the granting of certification, the petitioner
    appealed, claiming that the habeas court applied the incorrect standard
    for determining whether the petitioner was entitled to a new trial and
    that, upon application of the correct standard, which required the respon-
    dent, the Commissioner of Correction, to establish beyond a reasonable
    doubt that L’s incorrect testimony was immaterial, he was entitled to
    a new trial. Held that the state’s failure to correct L’s incorrect testimony
    that there was blood on the bathroom towel deprived the petitioner of
    a fair trial, and the habeas court’s judgment was reversed, as it was
    predicated on a determination that the petitioner was not entitled to a
    new trial because L’s incorrect testimony was immaterial: the habeas
    court incorrectly concluded that the respondent was not required to
    establish beyond a reasonable doubt that the state’s failure to correct
    L’s incorrect testimony was immaterial, as controlling case law made
    it clear that such a standard applies whenever the state fails to correct
    testimony that it knew or, as in the present case, should have known
    to be false; moreover, L, as the representative of the state police forensic
    laboratory, should have known that the towel had not been tested for
    blood, as he had an affirmative obligation to review any relevant test
    reports before testifying so as to reasonably ensure that his testimony
    would accurately reflect the findings of those tests, and L’s incorrect
    testimony must be imputed to the prosecutor who, irrespective of
    whether he elicited that testimony in good faith, is deemed to be aware
    of any and all material evidence in the possession of any investigating
    agency, including the state police forensic laboratory; furthermore, the
    respondent did not meet his burden of establishing beyond a reasonable
    doubt that L’s incorrect testimony was immaterial, as L’s testimony
    concerning the towel was elicited for the purpose of explaining why no
    evidence of blood connecting the petitioner to the murder was found,
    the state’s case against the petitioner was not so strong as to take it
    out of the purview of cases in which, as a result of the state’s use of
    testimony that it knew or should have known was false, reversal is
    virtually automatic, and the state’s failure to correct L’s testimony was
    material because it deprived the petitioner of the opportunity to impeach
    certain other testimony by L regarding how it was possible that the
    petitioner and B stabbed the victim twenty-seven times in a narrow space
    and tracked blood all over the victim’s home but somehow managed
    not to leave any trace of blood in their getaway vehicle, which showed
    no signs of having been cleaned when the police recovered it a few
    days after the murder.
    Argued October 11, 2018—officially released June 14, 2019*
    Procedural History
    Petition for a writ of habeas corpus, brought to the
    Superior Court in the judicial district of Tolland and
    tried to the court, Sferrazza, J.; judgment denying the
    petition, from which the petitioner, on the granting of
    certification, appealed. Reversed; judgment directed.
    W. James Cousins, with whom was Craig A. Raabe,
    for the appellant (petitioner).
    Michael J. Proto, assistant state’s attorney, with
    whom were Jo Ann Sulik, supervisory assistant state’s
    attorney, and, on the brief, David S. Shepack, state’s
    attorney, for the appellee (respondent).
    Opinion
    PALMER, J. The petitioner, Shawn Henning, and
    Ralph Birch were convicted of felony murder in connec-
    tion with the vicious 1985 slaying of sixty-five year old
    Everett Carr in Carr’s New Milford residence during
    what the police believed at the time to be a burglary
    gone wrong.1 After this court upheld his conviction; see
    State v. Henning, 
    220 Conn. 417
    , 431, 
    599 A.2d 1065
    (1991); the petitioner filed two habeas petitions, the
    first of which was dismissed with prejudice by the
    habeas court, White, J., on the basis of the petitioner’s
    purported refusal to appear at his habeas trial. The
    second habeas petition, which is the subject of this
    appeal, alleges, among other things, that the state
    deprived the petitioner of his due process right to a fair
    trial in violation of Brady v. Maryland, 
    373 U.S. 83
    , 87,
    
    83 S. Ct. 1194
    , 
    10 L. Ed. 2d 215
     (1963), and its progeny,
    which require the state to correct any testimony by a
    state’s witness when the state knew or should have
    known that that testimony was materially false or mis-
    leading. More specifically, the petitioner claims that his
    right to due process was violated by virtue of the state’s
    failure to correct the trial testimony of the then director
    of the state police forensic laboratory, Henry C. Lee,
    that a red substance on a towel found in the victim’s
    home had tested positive for blood when, in fact, no
    such test had been conducted, and, further, a test of
    the substance conducted in connection with the present
    case proved negative for blood. The habeas court, Sfer-
    razza, J.,2 rejected all of the petitioner’s claims, includ-
    ing his claim concerning Lee’s testimony about the
    towel, and this certified appeal followed. We agree with
    the petitioner that, contrary to the determination of the
    habeas court, he is entitled to a new trial due to the
    state’s failure to alert the trial court and the petitioner
    that Lee’s testimony was incorrect,3 and, therefore, we
    reverse the judgment of the habeas court.4
    The record reveals the following relevant facts and
    procedural history. On November 29, 1985, the then
    seventeen year old petitioner, together with his eighteen
    year old friend, Birch, and eighteen year old girlfriend,
    Tina Yablonski, stole a 1973 brown Buick Regal from
    an automobile repair shop in the town of Brookfield.
    Later that evening, the three teenagers drove the vehicle
    to New Hampshire to visit Birch’s mother. While there,
    the vehicle’s muffler was damaged and subsequently
    removed, causing the vehicle to make a loud noise when
    it was operated. When the trio returned to Connecticut
    on December 1, 1985, they went directly to the Danbury
    residence of Douglas Stanley, a local drug dealer, where
    they freebased cocaine. In addition to selling the teenag-
    ers drugs, Stanley also acted as a ‘‘fence’’5 for prop-
    erty they periodically stole from local businesses and
    homes. After leaving the Stanley residence, the peti-
    tioner and Birch dropped Yablonski off at her parents’
    home in the town of New Milford, arriving there at
    approximately 11:55 p.m.
    At that time, the victim was living at the home of
    his daughter, Diana Columbo, in New Milford, approxi-
    mately two miles from the Yablonski residence. Some-
    time between 9 and 9:30 p.m. on December 1, 1985,
    Columbo left the house to visit a friend. When she
    returned home the next morning, reportedly between
    4 and 4:30 a.m., she found the victim’s lifeless body in
    a narrow hallway adjacent to the kitchen, which led
    to the victim’s first floor bedroom. The victim, clad only
    in an undershirt and underwear, was lying in a pool
    of blood. Blood spatter and smears covered the walls
    around him, almost to the ceiling. An autopsy later
    revealed that the victim had sustained approximately
    twenty-seven stab wounds, a severed jugular vein, and
    blunt force trauma to the head. Investigators theorized
    that the victim had confronted his assailants in the
    hallway and fought for his life. The associate medical
    examiner could not determine the exact time of death,
    only that the victim died within twenty-four hours of
    his body being examined by the medical examiner and
    two and one-half to three hours of his last meal.
    The assailants left two distinct sets of bloody foot-
    prints near the victim’s body and in other locations
    throughout the house. Beneath the victim’s body, the
    police found what they believed to be a piece of the
    murder weapon—a small metal collar that separates a
    knife blade from the handle. The police also discovered
    blood on a dresser drawer in the victim’s bedroom.
    Inside the drawer were a pair of bloody socks and a
    blood stained cigar box, indicating that the assailants
    had rummaged through the house after the murder. A
    videocassette recorder, jewelry, several rolls of quar-
    ters, and some clothing were reported missing.
    The evidence established that, sometime between
    12:10 and 12:30 a.m. on the night of the murder, two
    of the victim’s neighbors heard a loud vehicle being
    operated near the victim’s residence. One of the neigh-
    bors, Alice Kennel, heard the vehicle stop at the lot
    beside her house for approximately twenty minutes and
    then drive away. The other neighbor, Brian Church,
    reported hearing a vehicle with ‘‘a very loud muffler
    sound’’ at around the same time. According to Church,
    the vehicle stopped for about thirty minutes and then
    drove away. Neither Kennel nor Church saw the vehicle
    or heard its doors open or shut. Nor could either witness
    place the vehicle or its occupants at the victim’s house.6
    Because the police suspected that the victim had
    interrupted a burglary, they began their investigation
    by compiling a list of known burglars in the area. Almost
    immediately, they became aware of the names of the
    petitioner, Birch, and Yablonski, as well as Stanley,
    whom they were told purchased stolen goods from the
    teenagers. The police interviewed the petitioner on
    December 4, 1985. By then, he, Birch, and Yablonski had
    heard about the victim’s murder from Stanley, whom
    the police had already interviewed.
    According to Yablonski, who testified for the state,
    she, the petitioner, and Birch discussed the murder with
    a group of people at Stanley’s residence on December
    2, 1985. From this discussion, they learned that a man
    had been killed after surprising a burglar and that the
    man’s dog also had been killed.7 Yablonski testified that,
    prior to speaking to the police, she, the petitioner, and
    Birch decided they should ‘‘get [their] stories straight’’
    to prevent the police from finding out about the stolen
    Buick and the burglaries that the teens had committed
    close in time to the murder. To that end, the trio agreed
    to tell the police that they had hitchhiked to and from
    New Hampshire, and then hitchhiked home from Stan-
    ley’s residence on the night of the murder, leaving the
    city of Danbury at approximately 12:30 or 1 a.m. and
    arriving in New Milford several hours later. According
    to Yablonski, however, they did not leave Danbury at
    12:30 a.m. but, rather, at around 11:20 p.m. Yablonski
    further testified that, while discussing the victim’s mur-
    der, the petitioner had said to her and Birch, ‘‘[w]hat
    if we get caught? What if they suspect us?’’ At the time,
    Yablonski had assumed that the petitioner was referring
    to the burglaries and the stolen Buick.
    When interviewed by the police on December 4, 1985,
    the petitioner informed the officers that he was aware
    that a man had been stabbed during a burglary. Accord-
    ing to the testimony of one of the officers, when the
    petitioner was shown a photograph of the victim, he
    indicated that he previously may have seen the man
    around town and asked whether he was the man with
    all the tattoos, even though no tattoos were visible in
    the photograph.8 The following day, Birch confessed to
    the theft of the Buick, and the petitioner took the police
    to where he had hidden it in a wooded area near
    a reservoir in New Milford. The petitioner and Birch
    also confessed to using the car in connection with the
    commission of several burglaries, for which they were
    placed under arrest.
    When the police recovered the Buick, it was evident
    that it had not been cleaned. According to several police
    reports and photographic exhibits, the vehicle was
    covered in dirt and filled with sand, sneakers, toilet-
    ries, food, blankets, pillows, various items of clothing,
    and what the police believed to be stolen electronics.
    Despite a thorough examination of the vehicle and the
    surrounding area, which involved draining two reser-
    voirs and the use of specially trained dogs, the police
    found no evidence linking the petitioner or Birch to the
    murder. A search of the victim’s neighborhood, includ-
    ing the surrounding roadways and fields adjacent to
    those roadways, also produced no incriminating evi-
    dence.
    On December 6, 1985, the police conducted a second
    interview of the petitioner. During this interview, which
    was recorded, the officers falsely claimed that Birch
    had implicated the petitioner in the murder. Specifi-
    cally, they told the petitioner that Birch had placed
    the entire blame for the murder on him and that Birch
    would ‘‘walk out of this thing’’ a free man while the
    petitioner would be ‘‘left . . . holding the bag.’’ They
    advised the petitioner that, if he would just ‘‘tell . . .
    the truth about what happened, the whole truth, like
    . . . Birch did, then it’s gonna weigh heavily in [his]
    favor.’’ The officers also informed the petitioner that
    the police had recovered a wealth of forensic evidence
    from the crime scene, that that evidence was being
    tested, and that it was just a matter of time before it
    would confirm his presence in the victim’s home.
    Finally, the officers informed the petitioner that, on the
    night of the murder, the victim’s neighbors had heard
    a loud vehicle that sounded just like the vehicle the
    petitioner and Birch were driving that evening. The
    petitioner vehemently denied any involvement in the
    crime and implored the officers to test the crime scene
    evidence, his clothing, and everything else that they
    had seized from him because he was certain it would
    prove his innocence. When the petitioner was told
    that the tests would take two weeks, the petitioner
    expressed impatience that he would have to wait so
    long to clear his name.
    According to the transcript of the December 6, 1985
    interview, the officers asked the petitioner what he
    knew about the murder. The petitioner responded that
    he knew only what people had told him and what every-
    one else knew. Specifically, the petitioner stated that,
    when he first heard about the murder, he was told ‘‘that
    some old man from New Milford had gotten knocked
    out in the middle of a burglary; then I heard from some-
    one else right after that . . . [that the victim] came
    in, saw who it was, and that was the reason for the,
    the knife or whatever they used on him. . . . [P]eople
    [told] me he got internal wounds in the gut, and then
    the story switched around and someone said he got his
    jugular vein ripped out of his neck or something . . . .’’
    When asked who he had gotten this information from,
    the petitioner responded, ‘‘that’s what the Danbury
    police told [Stanley] when they brought him down for
    questioning.’’ When the petitioner finished speaking,
    the officers tried unsuccessfully to elicit a confession
    from him by informing him that he had revealed details
    about the murder that only the killer would know. Spe-
    cifically, one of the officers stated, ‘‘you got this infor-
    mation about the old guy being knocked out that ties
    into some evidence that we’ve got, that’s never been in
    the paper. . . . [O]nly people who [know] something
    about [the murder would] say something like that.’’ The
    petitioner was later asked, ‘‘how [do] you know all these
    things that we don’t know? . . . You do too; you know
    more about that crime scene than [we] know.’’ The
    petitioner explained, ‘‘[t]hat’s just what . . . I heard,
    man, there was fucking six other people there when
    . . . [Stanley] told me that. Every other [person] . . .
    heard the same . . . thing. If it wasn’t for this stupid
    fucking piece of junk [car] that we . . . [stole] to get
    a ride home that night, none of this shit would [be] hap-
    pening.’’
    On December 9, 1985, the police conducted a third
    interview of the petitioner at the Litchfield Correctional
    Center. According to the testimony of one of the officers
    who was present there, when the petitioner was told
    that the police knew from the victim’s neighbors where
    the petitioner and Birch had parked on the night of the
    murder, and where they had turned their car around,
    the petitioner’s ‘‘right leg began to shake violently,’’ and
    he stated that, although he, Birch, and Yablonski may
    have turned around in the victim’s driveway, he was
    never in the victim’s house and did not kill the victim.
    During the course of the investigation, the police dis-
    covered that the petitioner had called his grandmother,
    Mildred Henning (Mildred) and his close childhood
    friend, Timothy Saathoff, from jail shortly after his
    arrest in 1985. In 1987 or 1988, Andrew Ocif, a detective
    with the Connecticut state police, interviewed Mildred
    and Saathoff about their recollection of those telephone
    calls. After speaking with Ocif, both Mildred and Saa-
    thoff agreed to provide statements indicating that the
    petitioner had told them that he was involved in various
    burglaries, that there was a burglary during which a
    man was killed, and that he did not kill him. Despite
    Mildred’s and Saathoff’s statements, the petitioner and
    Birch were not charged with the victim’s murder until
    November, 1988. At the petitioner’s criminal trial, Mil-
    dred testified that the petitioner had told her shortly
    after his arrest, during an emotional telephone call from
    jail, that he had been involved in a burglary during
    which a man and a dog were killed but that he was not
    the killer. Saathoff also testified that the petitioner had
    told him that he and another individual were involved
    in a burglary and that a man had been killed but that
    he did not commit the murder.9
    Because there was no forensic evidence connecting
    the petitioner to the crime, the state’s case against him
    relied primarily on the testimony of Mildred and Saa-
    thoff, the testimony of the victim’s neighbors, who had
    heard a loud vehicle on the night of the murder, the
    fact that the petitioner was driving such a vehicle that
    evening, and the testimony of Yablonski, whom the
    state relied on to establish consciousness of guilt predi-
    cated on the theory that the petitioner had lied to the
    police about the time of his return to New Milford to
    conceal his involvement in the murder. The state also
    called Lee, the criminalist and forensic scientist, to
    explain how it was possible for the petitioner and Birch
    to have stabbed the victim so many times without get-
    ting any blood on their clothing and without transferring
    any blood to the Buick. Lee testified that, although there
    clearly had been a violent struggle between the victim
    and his assailants, all of the blood spatter in the hall-
    way was ‘‘uninterrupted,’’ meaning that no individual
    or object was between the victim and the walls or floor
    to interrupt the blood spatter. According to Lee, this
    would explain why the assailants might not have been
    covered in the victim’s blood. When asked, however,
    whether, ‘‘based [on his] examination of the [crime]
    scene and the spatter patterns that appear on the floor
    and walls, [he] ha[d] an opinion as to whether . . . the
    perpetrators would have had blood on their persons,’’
    Lee answered, ‘‘[m]y opinion is maybe.’’
    During his testimony, Lee relied on certain crime
    scene photographs. One of the photographs showed
    two towels hanging beside a sink in the upstairs bath-
    room. Although the state now concedes that the towels
    had not been tested for the presence of blood, Lee
    testified at trial that they had been so tested. Lee testi-
    fied specifically that ‘‘there are some reddish color
    stain[s] [on one of the towels]. Those stains tested [posi-
    tive] for the presence of blood . . . .’’ Later, in refer-
    ence to the same photograph, Lee reiterated that one
    of the two towels had a ‘‘reddish color smear. That
    smear, I did a few tests, [which] show that it [tested]
    positive consistent with blood.’’ At no time did the assis-
    tant state’s attorney (prosecutor) correct Lee’s incor-
    rect testimony, apparently because he was unaware
    that it was untrue. Nor did the petitioner’s trial counsel,
    Carl D. Eisenmann, attempt to correct it, presumably
    because he, too, did not know that it was incorrect.
    At the close of the state’s case, the petitioner moved
    for a judgment of acquittal, which the trial court denied.
    Thereafter, the petitioner’s trial counsel presented a
    defense comprised of just two witnesses, Columbo, the
    victim’s daughter, and the petitioner. In an effort to
    establish time of death, the petitioner’s counsel asked
    Columbo whether she knew when her father had last
    eaten prior to being murdered. Columbo testified that
    she did not know. He also asked her whether she had
    ever told anyone that the victim was holding an object
    in his hand when she discovered his body. Columbo
    denied having said any such thing, and counsel asked
    no further questions.10
    In his trial testimony, the petitioner denied killing
    the victim or ever being in the victim’s home. The peti-
    tioner stated that, after he, Birch, and Yablonski left the
    Stanley residence on December 1, 1985, they ‘‘smoked’’
    cocaine before dropping Yablonski off at her parents’
    home in New Milford, and then he and Birch drove
    around siphoning gas for the Buick, after which they
    went to his father’s house. According to the petitioner’s
    father, the petitioner and Birch arrived at his house
    sometime between 2:15 and 4:20 a.m. The petitioner
    further testified that, although he had called Mildred
    and Saathoff after his arrest in 1985, at no time did he
    tell them that he was at the victim’s home on the night
    of the murder; according to the petitioner, he told them
    only that the police were accusing him of being there
    and that he feared they were trying to frame him. The
    petitioner testified that he told both Mildred and Saa-
    thoff ‘‘that the police . . . believed . . . [that he had]
    been at the [victim’s] residence because of things that
    [he] had said to the police when [he] was asked about
    [the] case, about the murder. When I was asked about
    the murder, I had known things that other people had
    not known, that the newspapers had not known yet,
    and . . . [that is what] I . . . told [them], that [the]
    man had been beaten to death, stabbed to death, and
    his dog was killed. . . . That’s what I [had] heard.’’
    In his closing argument, the prosecutor, relying on
    Lee’s reconstruction of the crime, argued ‘‘that the evi-
    dence shows that . . . there may have been two indi-
    viduals involved in that fight, with [the victim] holding
    one while the other stabbed him about the back and
    arms.’’ The prosecutor also argued to the jury that the
    bloody footwear impressions, blood stained bathroom
    towel, and ‘‘bloodied items . . . found in the dresser
    . . . in the northwest bedroom’’ indicated that ‘‘the bur-
    glary continued after the bloodletting.’’
    The prosecutor also explained to the jury that,
    although there was no forensic evidence connecting
    the petitioner and Birch to the crime, that was only
    because, as Lee had explained, all of the blood spatter
    was uninterrupted, meaning that the assailants would
    not have been covered in it. Another reason why there
    was no forensic evidence, the prosecutor asserted, was
    because the perpetrators had cleaned up before leav-
    ing the scene. ‘‘Remember also the bloody towel in the
    upstairs bathroom,’’ the prosecutor stated. ‘‘It gave them
    an opportunity to wash or have some access to that
    sink.’’ Finally, the prosecutor reminded the jury about
    the petitioner’s admissions to his grandmother and
    Saathoff, the noisy vehicle that was heard near the
    victim’s home on the night of the murder, the fact that
    the petitioner and Birch were driving a noisy vehicle
    that evening, and the petitioner’s consciousness of guilt
    as evidenced by the fact that he lied to the police about
    the time he left Danbury on the night of the murder.
    The prosecutor also reminded the jury that, according
    to the officers who first interviewed him, the petitioner
    had asked whether the victim was the man with many
    tattoos even though there were no tattoos visible in the
    photograph. Finally, the prosecutor maintained that the
    explanation that the petitioner purportedly gave to the
    officers as to why he knew about the tattoos—namely,
    because he previously had seen the victim around
    town— should not be believed.
    During closing argument, the petitioner’s trial coun-
    sel emphasized the lack of forensic evidence, arguing
    that it simply made no sense that the petitioner and
    Birch could have committed such a violent and bloody
    crime without getting a drop of blood on their shoes
    or clothing, or without transferring any trace evidence
    to the Buick. With respect to the testimony of Mildred
    and Saathoff, the petitioner’s counsel maintained that
    those witnesses were simply mistaken about what the
    petitioner had told them so many years ago. The peti-
    tioner’s counsel argued that, if the petitioner actually
    had been present when the victim was murdered, he
    would not have told his grandmother that a dog was
    killed during the commission of the crime because he
    would have known that no such thing had occurred.
    The fact that he did, counsel stated, supported the peti-
    tioner’s contention that he had told his grandmother
    and Saathoff that he had been arrested on burglary
    charges and that, as a result, the police suspected him
    of committing another burglary during which a man
    had been killed, but that he had nothing to do with
    that crime.
    The jury thereafter found the petitioner guilty of fel-
    ony murder, and the trial court rendered judgment sen-
    tencing the petitioner to a term of imprisonment of
    fifty years. This court later affirmed the trial court’s
    judgment in State v. Henning, supra, 
    220 Conn. 431
    . In
    2001, while serving his Connecticut sentence in a Vir-
    ginia prison, the petitioner filed a petition for a writ of
    habeas corpus, alleging ineffective assistance of trial
    counsel. As we previously indicated, the habeas court
    dismissed that petition with prejudice on the basis of
    the petitioner’s purported refusal to appear at the
    habeas trial. In 2012, the petitioner filed a second habeas
    petition in which he alleged, inter alia, that his trial
    counsel had rendered ineffective assistance in myr-
    iad ways, including but not limited to his failure to
    consult and present the testimony of a forensic foot-
    wear impression expert, failure to consult and present
    the testimony of a crime scene reconstructionist, failure
    to consult and present the testimony of a forensic
    pathologist, failure to investigate and present a third-
    party culpability defense implicating the victim’s daugh-
    ter,11 and failure to investigate, cross-examine, impeach,
    or otherwise challenge the testimony of the state’s wit-
    nesses, including Mildred, Saathoff and Ocif.12 The peti-
    tioner further claimed that his first habeas counsel,
    Michael Merati, rendered ineffective assistance of coun-
    sel by failing to adequately investigate and present his
    ineffective assistance of trial counsel claims and by
    allowing the petitioner’s first habeas petition to be dis-
    missed with prejudice on the basis of his purported
    failure to appear at the first habeas trial. The petitioner
    also claimed actual innocence on the basis of, among
    other things, numerous DNA tests conducted over the
    last decade by the Connecticut Forensic Science Labo-
    ratory, which had excluded the petitioner, Birch, and
    Yablonski as the source of DNA recovered from the
    crime scene, and had revealed the DNA of an unknown
    female on four key pieces of evidence with which the
    assailants were known or thought to have come into
    contact.13 Finally, the petitioner alleged that the state
    had violated his right to a fair trial by adducing Lee’s
    incorrect testimony that there was blood on the bath-
    room towel, testimony that had permitted the prosecu-
    tor to argue that the reason investigators failed to find
    forensic evidence on the petitioner’s clothing or in the
    Buick was because the petitioner had cleaned himself
    up before leaving the victim’s home.
    A consolidated trial on the petitioner’s second habeas
    petition, his petition for a new trial, and the closely
    related habeas and new trial petitions of Birch; see foot-
    note 4 of this opinion; was conducted over a period of
    several weeks in November and December, 2015, during
    which the petitioner and Birch called a number of
    expert and lay witnesses whose testimony cast serious
    doubt on the state’s theory of the case.14 In support of
    the petitioner’s claim that the prosecutor’s failure to
    correct Lee’s incorrect testimony entitled the petitioner
    to a new trial, he argued that, under a line of cases
    following the United States Supreme Court’s seminal
    opinion in Brady v. Maryland, 
    supra,
     
    373 U.S. 83
    ,
    including United States v. Bagley, 
    473 U.S. 667
    , 679 and
    n.9, 
    105 S. Ct. 3375
    , 
    87 L. Ed. 2d 481
     (1985) (opinion
    announcing judgment) (conviction obtained with state’s
    knowing use of perjured testimony must be set aside
    unless state can establish testimony was harmless
    beyond reasonable doubt), State v. Ouellette, 
    295 Conn. 173
    , 186, 
    989 A.2d 1048
     (2010) (prosecutor who knows
    that testimony of witness is false or substantially mis-
    leading must correct that testimony regardless of lack
    of intent to lie on part of witness), and State v. Cohane,
    
    193 Conn. 474
    , 498, 
    479 A.2d 763
     (prosecutor has respon-
    sibility to correct false testimony when prosecutor
    knew or should have known that testimony was false),
    cert. denied, 
    469 U.S. 990
    , 
    105 S. Ct. 397
    , 
    83 L. Ed. 2d 331
     (1984), the state was required to establish that Lee’s
    concededly incorrect testimony was immaterial beyond
    a reasonable doubt, a standard that, the petitioner fur-
    ther claimed, the respondent could not meet.
    Following the trial, the habeas court issued a memo-
    randum of decision in which it denied or dismissed all of
    the petitioner’s claims.15 With respect to the petitioner’s
    claim that the state had deprived him of a fair trial
    by failing to correct Lee’s concededly incorrect testi-
    mony,16 the court concluded, contrary to the contention
    of the petitioner, that the respondent, the Commissioner
    of Correction, was not required to demonstrate the
    immateriality, that is, the harmlessness, of that testi-
    mony beyond a reasonable doubt. The habeas court
    concluded, rather, that that heavy burden applies only
    when the state fails to correct perjured testimony, and
    it appeared clear to the habeas court that, in the absence
    of any contrary evidence, ‘‘Lee mistakenly, but honestly,
    believed he tested [the bathroom towel] rather than
    contrived a false story about having done so.’’ In other
    words, as the habeas court explained, although Lee had
    testified incorrectly, he was ‘‘not lying under oath.’’
    The habeas court then concluded that the applicable
    standard was ‘‘the classic test’’ for determining whether
    the petitioner was entitled to a new trial as a conse-
    quence of the state’s Brady violation, a standard that,
    as the habeas court further explained, is satisfied ‘‘only
    if [the petitioner can demonstrate that] there would
    be a reasonable probability of a different result if the
    [correct] evidence had been disclosed. . . . A rea-
    sonable probability . . . is one [that] undermines con-
    fidence in the outcome of the trial . . . .’’ (Citations
    omitted; internal quotation marks omitted.)
    Applying this standard, which is considerably less
    favorable to the petitioner than the standard that the
    petitioner himself had advanced, the habeas court con-
    cluded that Lee’s incorrect testimony was immaterial
    because the state’s case against the petitioner did not
    in any way rely on forensic evidence. Specifically, the
    court explained: ‘‘Because no forensic nexus was pro-
    duced, the state’s case against [the petitioner] hinged
    on the credibility of . . . [numerous] lay witnesses
    rather than on . . . Lee’s [testimony]. The impact of
    the victim’s neighbors’ testimony about being disturbed
    by a very loud vehicle and the false time line fabricated
    by Birch and [the petitioner] was far more incriminating
    and [was] in no way diminished by . . . Lee’s error as
    to whether a reddish smear on a towel . . . was or
    was not tested for blood.’’ The court further reasoned
    that Lee’s incorrect testimony also was immaterial
    because the prosecutor could have explained the
    absence of any forensic evidence simply by arguing that
    the petitioner and Birch had disposed of their bloody
    clothing and shoes sometime after leaving the victim’s
    home and prior to their arrest.
    On appeal, the petitioner claims that the legal stan-
    dard for materiality that the habeas court applied, that
    is, that the petitioner was required to demonstrate that
    the incorrect testimony at issue undermines confidence
    in the verdict, was incorrect, and that the proper stan-
    dard required the respondent to establish beyond a
    reasonable doubt that the testimony was immaterial.
    The petitioner further contends that, upon application
    of the proper standard, it is apparent that Lee’s incorrect
    testimony was material and, therefore, that the prosecu-
    tor’s failure to correct that testimony dictated that the
    petitioner be awarded a new trial because the state’s
    case was weak and Lee’s testimony offered jurors an
    explanation as to why no incriminating blood evidence
    was found despite the victim’s massive blood loss and
    the fact that the victim was killed at such close range.
    The respondent, for his part, maintains that (1) the
    habeas court properly applied the less stringent materi-
    ality standard of Brady, (2) Lee’s incorrect testimony
    was not adduced for the purpose of providing an expla-
    nation for why no blood evidence was found linking
    the petitioner to the victim’s murder, and the prosecutor
    did not rely on that testimony to that end, (3) the state’s
    case was so strong that there is no reasonable probabil-
    ity that the jury verdict would have been any differ-
    ent without it, and (4) even if we were to apply the
    demanding materiality standard pursuant to which the
    respondent must establish beyond a reasonable doubt
    that Lee’s incorrect testimony had no bearing on the
    verdict, the state’s evidence was so strong that that
    more exacting standard has been met. We disagree with
    each of the respondent’s contentions.
    We commence our consideration of the petitioner’s
    claim with a brief review of the principles that guide
    our analysis. ‘‘The rules governing our evaluation of
    a prosecutor’s failure to correct false or misleading
    testimony are derived from those first set forth by the
    United States Supreme Court in Brady v. Maryland,
    
    [supra,
     
    373 U.S. 86
    –87] . . . [in which] the court held
    that the suppression by the prosecution of evidence
    favorable to an accused upon request violates due pro-
    cess [when] the evidence is material either to guilt or
    to punishment, irrespective of the good faith or bad
    faith of the [prosecutor]. . . . The United States
    Supreme Court also has recognized that [t]he jury’s
    estimate of the truthfulness and reliability of a . . .
    witness may well be determinative of guilt or innocence,
    and it is upon such subtle factors as the possible interest
    of the witness in testifying falsely that a defendant’s
    life or liberty may depend. Napue v. Illinois, 
    360 U.S. 264
    , 269, 
    79 S. Ct. 1173
    , 
    3 L. Ed. 2d 1217
     (1959). Accord-
    ingly, the Brady rule applies not just to exculpatory
    evidence, but also to impeachment evidence . . .
    which, broadly defined, is evidence having the potential
    to alter the jury’s assessment of the credibility of a
    significant prosecution witness. . . . United States v.
    Rivas, 
    377 F.3d 195
    , 199 (2d Cir. 2004). . . .
    ‘‘Not every failure by the state to disclose favorable
    evidence rises to the level of a Brady violation. Indeed,
    a prosecutor’s failure to disclose favorable evidence
    will constitute a violation of Brady only if the evidence
    is found to be material. . . . In a classic Brady case,
    involving the state’s inadvertent failure to disclose
    favorable evidence, the evidence will be deemed mate-
    rial only if there would be a reasonable probability of
    a different result if the evidence had been disclosed.
    . . . A reasonable probability of a different result is
    . . . shown when the government’s evidentiary sup-
    pression undermines confidence in the outcome of the
    trial. Kyles v. Whitley, 
    514 U.S. 419
    , 434, 
    115 S. Ct. 1555
    ,
    
    131 L. Ed. 2d 490
     (1995).
    ‘‘When, however, a prosecutor obtains a conviction
    with evidence that he or she knows or should know to
    be false, the materiality standard is significantly more
    favorable to the defendant. [A] conviction obtained by
    the knowing use of perjured testimony is fundamentally
    unfair . . . and must be set aside if there is any reason-
    able likelihood that the false testimony could have
    affected the judgment of the jury. United States v.
    Agurs, 
    427 U.S. 97
    , 103, 
    96 S. Ct. 2392
    , 
    49 L. Ed. 2d 342
    (1976) . . . . This standard . . . applies whether the
    state solicited the false testimony or allowed it to go
    uncorrected . . . and is not substantively different
    from the test that permits the state to avoid having a
    conviction set aside, notwithstanding a violation of con-
    stitutional magnitude, upon a showing that the violation
    was harmless beyond a reasonable doubt.’’ (Citations
    omitted; footnotes omitted; internal quotation marks
    omitted.) Adams v. Commissioner of Correction, 
    309 Conn. 359
    , 369–72, 
    71 A.3d 512
     (2013).
    Furthermore, it is well established that this stringent
    materiality test applies when a prosecutor elicits testi-
    mony that he or she knows or should know to be false,
    ‘‘[r]egardless of the lack of intent to lie on the part of
    the witness . . . .’’ (Emphasis added; internal quota-
    tion marks omitted.) Greene v. Commissioner of Cor-
    rection, 
    330 Conn. 1
    , 15, 
    190 A.3d 851
     (2018), cert.
    denied sub nom. Greene v. Semple,            U.S.      , 
    139 S. Ct. 1219
    , 
    203 L. Ed. 2d 238
     (2019); accord State v.
    Satchwell, 
    244 Conn. 547
    , 561, 
    710 A.2d 1348
     (1998);
    see also State v. Cohane, supra, 
    193 Conn. 498
     (‘‘[t]he
    responsibility of the state’s attorney to conduct the
    prosecution in accordance with constitutional fair trial
    standards . . . cannot be defined or limited by the pre-
    cise contours of the perjury statute’’). ‘‘This strict stan-
    dard of materiality is appropriate in such cases not just
    because they involve prosecutorial [impropriety], but
    more importantly because they involve a corruption of
    the [truth seeking] function of the trial process. . . .
    In light of this corrupting effect, and because the state’s
    use of false testimony is fundamentally unfair, prejudice
    sufficient to satisfy the materiality standard is readily
    shown . . . such that reversal is virtually automatic
    . . . unless the state’s case is so overwhelming that
    there is no reasonable likelihood that the false testi-
    mony could have affected the judgment of the jury.’’
    (Citations omitted; emphasis added; internal quotation
    marks omitted.) Adams v. Commissioner of Correc-
    tion, supra, 
    309 Conn. 372
    –73. ‘‘In accordance with
    these principles, our determination of whether . . .
    false testimony was material under Brady and its prog-
    eny requires a careful review of that testimony and its
    probable effect on the jury, weighed against the strength
    of the state’s case and the extent to which the petitioner
    . . . [was] otherwise able to impeach [the witness].’’
    Id., 373. Finally, ‘‘because our role in examining the
    state’s case against the petitioner is to evaluate the
    strength of that evidence and not its sufficiency, we do
    not consider the evidence in the light most favorable to
    the state. See Lapointe v. Commissioner of Correction,
    
    316 Conn. 225
    , 342 n.88, 
    112 A.3d 1
     (2015) . . . .
    Rather, we are required to undertake an objective
    review of the nature and strength of the state’s case.’’
    (Citation omitted.) Skakel v. Commissioner of Correc-
    tion, 
    329 Conn. 1
    , 39, 
    188 A.3d 1
     (2018), cert. denied,
    U.S.    , 
    139 S. Ct. 788
    , 
    202 L. Ed. 2d 569
     (2019).
    In light of the foregoing principles, it is readily appar-
    ent that the habeas court incorrectly concluded that
    the respondent was not required to establish beyond a
    reasonable doubt that the prosecutor’s failure to correct
    Lee’s incorrect testimony was immaterial. Contrary to
    the respondent’s assertion, controlling case law makes
    it abundantly clear that that strict materiality standard
    applies whenever the state fails to correct testimony
    that it knew or, as in the present case, should have
    known to be false. As we explained in State v. Cohane,
    supra, 
    193 Conn. 474
    , a case directly on point, ‘‘[t]he
    references in Agurs to perjured testimony must be
    taken to include testimony [that the prosecutor knew
    or should have known] to be false or misleading even
    if the witness may not have such an awareness. . . .
    [T]he [prosecutor’s] actions in failing to disclose [false
    or misleading testimony] corrupt[s] the trial process
    and denie[s] the defendant his constitutional right to
    a fair trial just as surely as if the state’s case included
    perjured testimony.’’ 17 (Emphasis added; footnotes
    omitted.) 
    Id.,
     498–99; see also Mesarosh v. United
    States, 
    352 U.S. 1
    , 9, 
    77 S. Ct. 1
    , 
    1 L. Ed. 2d 1
     (1956)
    (‘‘The question of whether [the witness’] untruthfulness
    . . . constituted perjury or was caused by a psychiatric
    condition can make no material difference . . . .
    Whichever explanation might be found to be correct in
    this regard, [the witness’] credibility has been wholly
    discredited . . . . The dignity of the . . . [g]overn-
    ment will not permit the conviction of any person on
    tainted testimony.’’).
    Furthermore, it is inarguable that Lee, as the repre-
    sentative of the state police forensic laboratory, should
    have known that the bathroom towel had not been
    tested for blood. He, like any such witness, had an
    affirmative obligation to review any relevant test
    reports before testifying so as to reasonably ensure that
    his testimony would accurately reflect the findings of
    those tests. To conclude otherwise would permit the
    state to gain a conviction on the basis of false or mis-
    leading testimony even though the error readily could
    have been avoided if the witness merely had exercised
    due diligence; such a result is clearly incompatible with
    the principles enunciated in Brady and its progeny.
    Lee’s incorrect testimony also must be imputed to the
    prosecutor who, irrespective of whether he elicited that
    testimony in good faith, is deemed to be aware of any
    and all material evidence in the possession of any
    investigating agency, including, of course, the state
    police forensic laboratory. See, e.g., Kyles v. Whitley,
    
    supra,
     
    514 U.S. 437
    –38 (‘‘[T]he . . . prosecutor has a
    duty to learn of any favorable evidence known to the
    others acting on the government’s behalf in the case,
    including the police. But whether the prosecutor suc-
    ceeds or fails in meeting this obligation [whether, that
    is, a failure to disclose is in good faith or bad faith] . . .
    the prosecution’s responsibility for failing to disclose
    known, favorable evidence rising to a material level of
    importance is inescapable.’’ [Citation omitted.]). Nota-
    bly, the respondent does not claim otherwise. Thus, the
    only question remaining is whether the respondent has
    met his burden of establishing that the prosecutor’s
    failure to correct Lee’s testimony concerning the bath-
    room towel was harmless beyond a reasonable doubt.
    We agree with the petitioner that he has not.
    As we previously indicated, the respondent maintains
    that Lee’s incorrect testimony was immaterial because
    the prosecutor did not offer that testimony to persuade
    the jury ‘‘that the towel smear explained the absence
    of physical evidence,’’ only to establish ‘‘that a burglary
    occurred, and that it occurred . . . ‘after the bloodlet-
    ting.’ ’’ The respondent also argues that the state’s case
    against the petitioner was so overwhelming that the
    petitioner would have been convicted regardless of
    Lee’s incorrect testimony.
    First, we disagree that that incorrect testimony was
    offered solely for the purpose of establishing the exis-
    tence and timeline of the burglary. As we explained,
    during his closing argument, the prosecutor expressly
    urged the jury to ‘‘[r]emember . . . the bloody towel
    in the upstairs bathroom. It gave them an opportunity
    to wash . . . .’’ (Emphasis added.) This argument by
    the prosecutor leaves no doubt that the testimony con-
    cerning the bathroom towel was elicited for the purpose
    of explaining why no evidence of blood connecting the
    petitioner to the murder was found. Although the pros-
    ecutor also argued to the jury that it reasonably could
    find, in accordance with other testimony from Lee,
    that the petitioner never came in contact with any of
    the victim’s blood despite the extremely bloody crime
    scene, the prosecutor further stated to the jury that the
    blood on the bathroom towel supported the conclusion
    that the petitioner had washed off any of the victim’s
    blood with which he had come in contact. The impor-
    tance of this latter argument cannot fairly be mini-
    mized in light of how profusely the victim bled as a
    result of the twenty-seven stabs wounds he suffered at
    the hands of his assailants. That argument, moreover,
    was intended to address Lee’s testimony, offered in
    response to the question of whether ‘‘the perpetrators
    would have had blood on their persons’’ as a result of
    their attack on the victim, acknowledging that ‘‘maybe’’
    they did. In fact, it is apparent that the perpetrators did
    get at least some of the victim’s blood on them because
    they left several sets of bloody footprints in the house,
    and blood was discovered on a dresser drawer in the
    victim’s bedroom and on socks and a cigar box that
    were found in that drawer, all of which indicate that
    the perpetrators, with blood on their shoes and hands,
    made their way through the victim’s house following
    the deadly assault on the victim.
    Nor do we agree with the respondent that the state’s
    case against the petitioner was so strong as to take this
    case out of the purview of cases in which, as a result
    of the state’s use of testimony that it knew or should
    have known was false, reversal is ‘‘virtually automatic
    . . . .’’ (Internal quotation marks omitted.) Adams v.
    Commissioner of Correction, supra, 
    309 Conn. 372
    .
    Although sufficient to sustain a conviction, the state’s
    evidence was hardly overwhelming. The strongest evi-
    dence by far was the testimony of Mildred, the petition-
    er’s grandmother, and Saathoff, both of whom provided
    nearly identical statements to the police two or three
    years after the victim’s murder. As we discussed pre-
    viously, both Mildred and Saathoff testified that the
    petitioner had called them from jail after his arrest in
    1985 and told them that he had been involved in a
    burglary during which a man had been killed but that
    he was not the killer. The strength of this evidence was
    considerably diluted, however, by virtue of Mildred’s
    repeated statement that the petitioner also told her
    that a dog had been killed during the commission of
    the victim’s murder. Surely, jurors must have wondered
    why, if the petitioner actually was present when the
    victim was murdered, he informed his grandmother,
    Mildred, that a man and a dog were killed. We note,
    moreover, that, beyond the petitioner’s purported bare-
    bones admission that the murder occurred and that
    he was present when it occurred, neither Mildred nor
    Saathoff claimed to have learned from the petitioner
    any more specific information about the crime or the
    petitioner’s role in it.
    In addition to the testimony of Mildred and Saathoff,
    the only other evidence that the state presented was
    the testimony of the victim’s two neighbors who had
    heard a car with a loud engine shortly after midnight
    on the night of the murder, Yablonski’s testimony that
    the petitioner and Birch had lied to the police that they
    were in Danbury at that time, and the fact that the
    petitioner had asked whether the victim was the man
    with all the tattoos when the police showed him a
    photograph of the victim. This additional evidence may
    have cast suspicion on the petitioner and was sufficient
    to support the jury’s guilty verdict when considered
    together with the testimony of Mildred and Saathoff,
    but the state’s case against the petitioner was certainly
    not so overwhelming that we can be satisfied beyond
    a reasonable doubt that Lee’s incorrect testimony was
    harmless. As this court previously has recognized in
    the Brady context, a murder prosecution predicated
    primarily on a defendant’s alleged or actual admissions,
    and in which there are no eyewitnesses and no forensic
    or other physical evidence connecting the defendant to
    the crime, is not a strong case; see Skakel v. Commis-
    sioner of Correction, supra, 
    329 Conn. 85
    –86; Lapointe
    v. Commissioner of Correction, supra, 
    316 Conn. 323
    –25; and is therefore one in which ‘‘prejudice suffi-
    cient to satisfy the materiality standard is readily shown
    . . . .’’ (Citations omitted; internal quotation marks
    omitted.) Adams v. Commissioner of Correction,
    supra, 
    309 Conn. 372
    .
    The respondent asserts, nonetheless, that there is no
    reasonable possibility that the petitioner was preju-
    diced by Lee’s incorrect testimony because there is lit-
    tle chance that the jury credited the state’s theory that
    the assailants washed up before leaving. Specifically,
    the respondent argues that, ‘‘if the prosecution [had]
    sought to portray the towel smear as a portal through
    which blood drenched killers passed only to emerge
    on the other side completely clean, it would have failed
    miserably. In the absence of any other evidence that
    the killers cleaned up at the scene . . . it is simply not
    reasonable to believe that all of that blood reduced to
    a single towel smear. The more obvious conclusion is
    that the jury found that, consistent with . . . Lee’s
    spatter testimony, the perpetrators were not drenched
    in blood . . . .’’ That conclusion is far from obvious
    and by no means compelled from the facts. Indeed, we
    cannot say with any confidence that the jury found
    either theory more plausible than the other as a basis
    for explaining the total absence of forensic evidence.
    The more probable scenario, rather, is that the jury,
    like the state, relied on both theories. That is, the jury
    very reasonably could have found, on the basis of the
    blood spatter testimony, that the killers may have had
    less blood on them than the evidence otherwise would
    seem to indicate, and, on the basis of the towel testi-
    mony, whatever blood they did have on them, they
    simply washed off.
    Finally, because Lee’s testimony provided the sole
    evidentiary basis for both of the state’s theories regard-
    ing the dearth of forensic evidence, the prosecutor’s
    failure to correct Lee’s testimony about the bathroom
    towel was material for the additional reason that it
    deprived the petitioner of the opportunity to impeach
    Lee’s blood spatter testimony. See, e.g., Merrill v. War-
    den, 
    177 Conn. 427
    , 431, 
    418 A.2d 74
     (1979) (‘‘The fact
    that [the witness] was a key witness made his credibility
    crucial to the state’s case. In assessing his credibility
    the jury [was] entitled to know that he was testifying
    under false colors. Such knowledge could have affected
    the result.’’); State v. Grasso, 
    172 Conn. 298
    , 302, 
    374 A.2d 239
     (1977) (‘‘[w]hen a conviction depends entirely
    [on] the testimony of certain witnesses . . . informa-
    tion affecting their credibility is material in the constitu-
    tional sense since if they are not believed a reasonable
    doubt of guilt would be created’’). To be sure, the prose-
    cutor’s greatest challenge at trial was to explain how
    it was possible for two teenagers to have stabbed the
    victim twenty-seven times in the confines of a narrow
    hallway, severed his jugular vein, struck him over the
    head several times, tracked blood all over the house,
    and yet somehow managed not to leave any trace evi-
    dence in their getaway vehicle—which, as we pre-
    viously discussed, did not show any signs of having
    been cleaned when the police recovered it a few days
    later—or elsewhere. To answer this question, the state
    proffered two theories, one of which the respondent
    now concedes was predicated on Lee’s incorrect testi-
    mony. If the jury had known that Lee’s testimony about
    finding blood on the bathroom towel was incorrect,
    that knowledge might well have caused it to question
    the reliability of his other testimony. If that had
    occurred, the state’s entire case against the petitioner
    could very well have collapsed.18
    In light of the foregoing, we conclude that the state’s
    failure to correct Lee’s testimony that there was blood
    on the bathroom towel deprived the petitioner of a fair
    trial. Accordingly, the judgment of the habeas court
    must be reversed insofar as it was predicated on that
    court’s determination that the petitioner is not entitled
    to a new trial because Lee’s incorrect testimony was
    immaterial.
    The judgment is reversed and the case is remanded
    with direction to render judgment granting the habeas
    petition and ordering a new trial.
    In this opinion the other justices concurred.
    * June 14, 2019, the date that this decision was released as a slip opinion,
    is the operative date for all substantive and procedural purposes.
    1
    The petitioner and Birch were tried and convicted separately.
    2
    Unless otherwise noted, all references hereinafter to the habeas court
    are to Sferrazza, J., and all references to the habeas petition are to the
    petition in the present case.
    3
    As we discuss more fully hereinafter, the respondent, the Commissioner
    of Correction, concedes that the testimony of Lee at issue in this case was
    false or misleading—terms commonly used in cases, like the present one,
    involving due process claims stemming from the state’s improper use of
    testimony in a criminal trial—in the sense that it was factually wrong or
    incorrect. In its memorandum of decision, however, the habeas court found
    that Lee’s testimony was mistaken rather than intentionally false or
    untruthful—a conclusion that the petitioner has not challenged—and we
    have no reason to question that determination. Nevertheless, for the reasons
    set forth hereinafter, we conclude that, in the circumstances presented, the
    petitioner is entitled to a new trial because, under Brady and its progeny,
    it makes no difference whether Lee’s testimony was intentionally false or
    merely mistaken. In either situation, if, as we conclude, the state knew or
    should have known that the testimony was incorrect, the petitioner is entitled
    to a new trial unless the respondent can demonstrate that the incorrect
    testimony was harmless beyond a reasonable doubt, a burden the respondent
    cannot meet. Finally, although Lee’s testimony was false or misleading
    insofar as it was contrary to the facts, we characterize his testimony as
    incorrect rather than false or misleading because the latter terms might be
    understood as connoting a dishonest or untruthful intent, an implication
    that would be incompatible with the habeas court’s determination.
    4
    The petitioner also filed a petition for a new trial; see General Statutes
    § 52-270 (a); on the basis of newly discovered evidence. Prior to trial, the
    habeas court consolidated that petition with the present habeas petition
    and with the closely related habeas and new trial petitions of Birch. The
    and Birch separately appealed to the Appellate Court from the judgments
    denying their habeas and new trial petitions. We thereafter transferred all
    four appeals to this court pursuant to General Statutes § 51-199 (c) and
    Practice Book § 65-2. In a separate opinion also issued today, we have
    dismissed as moot the petitioner’s appeal from the habeas court’s denial of
    his petition for a new trial because of our determination that the petitioner
    must be afforded a new trial due to the state’s failure to correct Lee’s
    incorrect testimony. See Henning v. State, 
    334 Conn. 33
    , 36,            A.3d
    (2019). We also have reversed the judgment of the habeas court denying
    Birch’s habeas petition; see Birch v. Commissioner of Correction, 
    334 Conn. 37
    , 69,       A.3d       (2019); see also Birch v. State, 
    334 Conn. 69
    , 72,
    A.3d        (2019) (dismissing as moot Birch’s appeal from denial of petition
    for new trial); a decision that, like our decision in the present case, is
    predicated on the state’s use of Lee’s incorrect testimony.
    We note, finally, that, at various points throughout this opinion, we briefly
    discuss a number of the other claims raised by the petitioner in his habeas
    petition and in his petition for a new trial. We do not decide the merits of
    any of those claims, however, in light of our conclusion that the petitioner
    is entitled to a new trial as a result of Lee’s incorrect testimony. To the
    extent that we discuss them, we do so only to place the present claim in
    the broader context of the several significant issues that the petitioner also
    raises as a basis for his entitlement to a new trial.
    5
    A ‘‘fence’’ is a person who receives and sells stolen goods.
    6
    A third neighbor, Gary Smith, also reported hearing a vehicle with a
    loud muffler on the night of the murder. Unlike Kennel and Church, Smith
    observed the vehicle as it drove past his house. Although Smith did not
    testify at the petitioner’s criminal trial, he did so at Birch’s criminal trial,
    at which he described the vehicle’s taillights as being ‘‘fairly wide set’’ and
    ‘‘round in appearance.’’ When Smith was shown a photograph of the stolen
    Buick, he testified that its taillights were not those of the vehicle he had
    observed on the night of the murder. In his habeas petition, the petitioner
    alleged that his trial counsel, Carl D. Eisenmann, rendered ineffective assis-
    tance by failing to call Smith as a witness to rebut the state’s theory that
    the loud vehicle that was heard in the vicinity of the victim’s home was the
    stolen Buick.
    7
    It is undisputed that no dog was killed or otherwise harmed in the
    commission of the victim’s murder.
    8
    The victim did have tattoos. At his criminal trial, however, the petitioner
    denied indicating to the police that he had ever seen the victim prior to
    being shown his photograph.
    9
    Saathoff recanted his testimony several years later, stating that the peti-
    tioner had never confessed to any involvement in the burglary and the
    victim’s murder. Saathoff stated that the only reason he testified that the
    petitioner did so confess was because Ocif had told him that it would help
    the petitioner. At the petitioner’s habeas trial, Ocif did not deny telling
    both Mildred and Saathoff that the police had strong evidence placing the
    petitioner at the crime scene and that it would actually help the petitioner
    if they would say that he had told them that he was there but that he did
    not kill the victim.
    10
    As we explain more fully hereinafter; see footnote 11 of this opinion;
    the petitioner alleged in his habeas petition that his trial counsel was ineffec-
    tive by failing to raise a third-party culpability defense against Columbo on
    the basis of numerous lies that she had told the police in the early hours
    of the investigation, and in light of other suspicious behavior that she exhib-
    ited at that time, including, on the night of the murder, screaming to the
    emergency services dispatcher, ‘‘[o]h God, he’s got a knife in his hand.’’
    11
    More specifically, at the habeas trial, the petitioner sought to demon-
    strate that the crime scene had been staged to resemble a burglary and that
    his trial counsel had rendered ineffective assistance in failing to raise a third-
    party culpability defense against Columbo and Richard Burkhart, Columbo’s
    lover and employer at the time of the murder, and for whom the victim also
    had worked and who allegedly owed the victim money. In support of this
    contention, the petitioner adduced evidence that, when Columbo was ini-
    tially interviewed by the police on the night of the murder, she claimed to
    have been home all evening and to have heard the victim coughing, although
    she did not check on him. She then told the police that she actually had
    gone out that evening and returned home between 2:30 and 3 a.m. Later,
    she told the police that she had lied in her earlier statements to prevent
    Burkhart from finding out that she had been with another man that evening.
    Columbo also told the police that she had left the house at around 9:30 p.m.
    and returned sometime between 4 and 4:30 a.m. Police records indicate,
    however, that Columbo did not call for help until 4:50 a.m. and that, when
    she did, according to the emergency dispatcher, she screamed, ‘‘[o]h God,
    he’s got a knife in his hand.’’ There was also evidence that Columbo exhibited
    highly unusual behavior immediately after the murder. For example, one of
    the first responders, Anita Bagot, testified that Columbo barricaded herself
    in the dining room shortly after the police arrived and, later, asked Bagot,
    ‘‘[w]hy would he do it . . . [w]hy would he do it,’’ clearly suggesting that
    she knew the identity of the assailant. The petitioner also presented evidence
    at the habeas trial that there was animus between Burkhart and the victim,
    despite Burkhart’s statement to the police that he and the victim ‘‘had an
    excellent relationship’’ and that he ‘‘loved’’ the victim. One witness who had
    worked for Burkhart, Cynthia M. Russo-Donaghy, testified that Burkhart
    had a scratch on his face on the morning after the murder and that the
    victim had told her that Burkhart was a ‘‘son of a bitch’’ and that he ‘‘hate[d]’’
    him. The petitioner also established that the state police received an anony-
    mous telephone call on May 22, 1986, from an unknown male who said that
    Burkhart had murdered the victim.
    We note, finally, that the petitioner, in support of his petition for a new
    trial, presented the deposition testimony of John Andrews, who stated that,
    after the murder, he and Columbo became romantically involved and, for
    a time, lived together. Andrews stated that, during an argument one night,
    Columbo charged at him with a knife and told him that ‘‘she would kill [him]
    like she killed her father.’’ According to Andrews, late at night sometime
    thereafter, while he was in the kitchen and Columbo was upstairs, he was
    attacked and severely injured by an unknown assailant who beat him over
    the head and repeatedly stabbed him. Andrews further explained that, during
    the assault, he heard a male voice telling him to ‘‘leave and don’t come
    back.’’ Following this incident, Andrews decided to move out and, while
    packing his belongings, found a six to seven inch knife blade without a
    handle protruding from a basement wall. Andrews never told anyone about
    Columbo’s threat or his discovery of the knife blade until years later, when
    he was contacted by the Connecticut Innocence Project. In its memorandum
    of decision, the habeas court observed that ‘‘Andrews [had] no obvious
    reason to fabricate [his] recollections.’’
    12
    In particular, the petitioner alleged that his trial counsel had rendered
    ineffective assistance by failing to interview Mildred, Saathoff and Ocif prior
    to trial, and by failing to impeach their testimony at trial. The petitioner
    argued that, if trial counsel had interviewed Mildred and Saathoff, he would
    have learned that Ocif had goaded them into providing false testimony in
    the misguided belief that they were helping the petitioner. The petitioner
    further claimed that, if trial counsel had interviewed Ocif, he would have
    discovered that Ocif had failed to adequately investigate any other suspects
    or their possible motives for the crime or even to familiarize himself with
    the investigative file because Ocif was convinced of the petitioner’s guilt
    founded on the theory that the victim was killed during the course of a
    burglary. In support of this contention, the petitioner elicited testimony
    from Ocif that he did not assist in the crime scene investigation and had
    seen only a single photograph of the crime scene. Ocif also did not know
    at the time of his investigation that Columbo had lied to the police about
    her whereabouts on the night of the murder, that she had barricaded herself
    in the dining room after the police arrived, and that, when she called for
    emergency assistance, indicated to the dispatcher that there was a man in
    her home holding a knife. Ocif also was unaware of the animus between
    the victim and Burkhart, and the fact that the police had received an anony-
    mous call identifying Burkhart as the killer.
    13
    In this regard, Christine Mary Roy, a forensic science examiner with
    the state’s Division of Scientific Services, testified at the petitioner’s habeas
    trial that, in addition to the victim’s DNA, the DNA profile of an unknown
    female was found on the bloody cigar box, the inside of the front waistband
    of the victim’s underwear, the metal ring that was found under the victim
    that was thought to be part of the murder weapon, and a floor board that
    the police had removed, which contained two sets of bloody footprints.
    Lucinda Lopes-Phelan, another forensic science examiner with the Division
    of Scientific Services, testified that she had tested the victim’s underwear
    on the theory that one of the assailants may have grabbed him there during
    the struggle that led to the victim’s murder.
    14
    For example, in support of his claim that trial counsel was ineffective
    insofar as counsel failed to consult a forensic footwear impression expert,
    the petitioner presented the testimony of William Bodziak, a former agent
    with the Federal Bureau of Investigation (FBI) and a prominent footwear
    impression expert. Bodziak testified that, using techniques available at the
    time of the petitioner’s criminal trial, he was able to determine that one of
    the two sets of bloody footprints from the crime scene could not possibly
    have been left by either the petitioner or Birch because it was made by a
    size 9 or smaller shoe, perhaps even as small as a size 7 and 1/2, and the
    petitioner and Birch wore shoes sized 11 and 1/2 and 10 and 1/2 to 11,
    respectively. According to Bodziak, the size difference between the bloody
    footprints and the petitioner’s and Birch’s shoes at the time of the murder
    was ‘‘enormous . . . .’’ With respect to Bodziak’s expertise, the habeas
    court made the following findings: ‘‘Obviously, expert footwear analysts
    were available at the time of the petitioner’s [criminal] trial in 1989. From
    1973 to 1997 . . . Bodziak was a special agent for the FBI who specialized
    [in], among other [things] . . . footwear imprint analysis. He testified at
    the [petitioner’s] habeas trial, and he is a well trained, extensively experi-
    enced, and highly qualified expert in this field of criminology. He has testified
    in nearly every state and federal trial court in the United States, including
    at the trials of [Orenthal James] Simpson and [Timothy McVeigh] the Okla-
    homa City bomber.’’
    15
    We note that one of the claims that the habeas court rejected was the
    claim that the petitioner’s first habeas counsel had rendered ineffective
    assistance by allowing the petitioner’s first habeas petition to be dismissed
    with prejudice. In light of that conclusion, the habeas court declined to
    consider the merits of several of the petitioner’s claims because they had
    been raised in the first petition, and, by virtue of the dismissal of that petition
    with prejudice, they could not be litigated in any subsequent habeas petition.
    In rejecting this claim of ineffective assistance by first habeas counsel, the
    habeas court discredited the petitioner’s testimony that his first habeas
    counsel had told him that he need not appear for the scheduled habeas trial
    because he was withdrawing the petition without prejudice, which would
    have allowed the petitioner to refile it at a later date if and when additional
    evidence became available. In doing so, the habeas court observed that
    when the first habeas court asked first habeas counsel whether ‘‘it is true
    that your client refused to come here,’’ he replied, ‘‘[y]es.’’ The court then
    stated that it could discern ‘‘no possible motivation for [first habeas counsel]
    to mischaracterize the petitioner’s position about refusing to appear and
    participate in his own case with respect to [his] allegation of ineffective
    assistance [against his trial counsel]. . . . The petitioner neither appealed
    [from] the dismissal nor asserted any misrepresentation or misunderstanding
    as to the dismissal with prejudice for the eight years between the dismissal
    and the filing of the present habeas action.’’ It is undisputed, however, that
    the petitioner, acting pro se, filed a timely petition for certification to appeal
    from the judgment dismissing his first habeas petition and a motion for the
    appointment of new habeas counsel, which the first habeas court denied.
    After the dismissal of his first habeas petition, the petitioner also sent the
    court a letter he had received from first habeas counsel advising him that
    he need not appear. On appeal to this court, the petitioner contends that
    the habeas court incorrectly determined that first habeas counsel did not
    render ineffective assistance by allowing his first habeas petition to be
    dismissed with prejudice or by representing to the first habeas court that
    his claims against trial counsel lacked merit. As we explained, because we
    conclude that the petitioner is entitled to a new trial due to the prosecutor’s
    failure to correct Lee’s incorrect testimony that there was blood on the
    bathroom towel, we do not reach the merits of this or any of the petitioner’s
    other claims. We take this opportunity to reiterate, however, that a habeas
    petition may not be dismissed with prejudice in the absence of a knowing,
    voluntary, and intelligent waiver by the petitioner of the claims contained
    therein. See, e.g., Nelson v. Commissioner of Correction, 
    326 Conn. 772
    ,
    785–86, 
    167 A.3d 952
     (2017) (‘‘a habeas court may accept the withdrawal
    of a habeas petition ‘with prejudice,’ allowing the petitioner to waive any
    future habeas rights, as long as the withdrawal is knowing, voluntary, and
    intelligent’’); Fine v. Commissioner of Correction, 
    147 Conn. App. 136
    , 145,
    
    81 A.3d 1209
     (2013) (‘‘in light of the magnitude of the right at issue . . .
    we will not merely presume a waiver of [the petitioner’s habeas petition
    with prejudice] on the basis of a silent record . . . but will give effect to
    a waiver only after ensuring that it has been clearly expressed on the record,
    and that it is knowing, intelligent, and voluntary’’).
    16
    In regard to that testimony, the habeas court found in relevant part:
    ‘‘As to . . . Lee’s testimony, he erroneously testified that he tested a reddish
    substance on a towel seized from an upstairs bathroom, which test indicated
    a positive result for blood. That stain was never tested by . . . Lee or
    anyone at the crime laboratory before the petitioner’s criminal trial. In
    conjunction with the present habeas action, the towel was tested, and the
    reddish smear proved negative for blood.’’ The respondent, the Commis-
    sioner of Correction, has never contested the results of that test.
    17
    For reasons unknown to us, the respondent, in his brief, does not even
    cite to Cohane, let alone seek to distinguish that case or to have this court
    overrule it. The habeas court similarly failed to cite to Cohane.
    18
    We note that the habeas court, in reaching a different conclusion, rea-
    soned that the incorrect testimony was immaterial because the prosecutor
    could have explained the absence of forensic evidence by arguing that the
    petitioner had disposed of the evidence before his December 6, 1985 arrest
    on burglary charges. As the petitioner observes, however, the prosecutor
    did not make this argument at trial, and the respondent does not make it
    on appeal. This is undoubtedly so because the trace evidence likely to have
    been left by the perpetrators in the present case is not the kind of evidence
    that could be readily identified, collected and disposed of by the perpetrators.
    Moreover, testimony adduced by the state indicated that the petitioner made
    no attempt to clean the Buick allegedly used in connection with the crime,
    and no evidence was found in or near that vehicle, which was subjected to
    a thorough examination by the investigating authorities.