*322The petitioner, Jeffrey Williams, appeals from the judgment of the habeas court denying his petition for a writ of habeas corpus. He claims that the court *568improperly concluded that he failed to prove that his trial attorney provided ineffective assistance of counsel by failing (1) to challenge the state's medical evidence by consulting and calling as a witness a medical expert with experience evaluating medical evidence in child sexual abuse cases, and (2) to present the testimony of John Strugar, a neurosurgeon, who performed back surgery on the petitioner in August, 1999. We affirm the judgment of the habeas court.
This court's decision in the petitioner's direct appeal sets forth the following relevant facts, which the jury in the petitioner's criminal trial reasonably could have found, and procedural history. "Between the spring of *3231997 and mid-October, 1999, the victim1 and her three younger sisters lived with their mother, who was the [petitioner's] girlfriend, her uncle and the [petitioner] at various residences in the city of New Haven. The victim was approximately eight years old when the [petitioner] began to abuse her. The [petitioner] beat her about once a week for a variety of reasons. In November, 1997, the [petitioner] knocked the victim to the floor, causing a spiral fracture of her left humerus. The victim was taken to a hospital, but her mother instructed her and her sisters to attribute the injury to the victim's having fallen off her bed. On another occasion, the [petitioner] banged the victim's head on a sink, breaking one of her teeth. When the victim told her mother of the broken tooth, her mother instructed her to go outside and play. The [petitioner] struck the victim with a wooden paddle and on one occasion gave her a black eye. The victim's mother put makeup on the bruise to cover it. The victim's teacher, however, noticed the makeup and bruise. At another time, the school personnel discovered a hickey on the victim's neck. The victim had told her mother that the [petitioner] had given her the hickey. The [petitioner] convinced her mother that someone else had given the victim a hickey and then beat the victim.
"Sometime between August and October, 1999, the [petitioner] placed the victim in a situation that was likely to injure her health. When the victim did not comply with the [petitioner's] instructions, he made her put her head out a window and then he poured water over her head. He made her stay there until it was time to go to school.
"At night, the [petitioner] would awaken the victim and take her to his room where he told her to rub his *324back.2 Initially, the [petitioner] lay face down but would turn over and instruct the victim to rub his lower body. The [petitioner] took the victim's hand and placed it on his penis, at first outside of his boxer shorts and then inside. The [petitioner's] sexual abuse progressed beyond back-rubs and having the victim touch his penis. The [petitioner] began to grope the victim's vagina, buttocks, thighs and undeveloped chest. On three or four occasions, the [petitioner] forced his penis into the victim's vagina.3 If the victim asked the [petitioner] to stop, he would tell her not to tell him what to do. The *569victim bled after the first and second rapes and told her mother, who told her she was having her menstrual period. Although the victim reported the abuse to her grandfather, he refused to believe her. Consequently, the victim did not report the continuing abuse for fear that no one would believe her. The victim eventually disclosed the [petitioner's] sexual abuse to her cousin but implored her not to tell anyone.
"In early 2001, the victim, her sisters and mother moved to a homeless shelter in Waterbury, after which the victim and her sisters were removed from their mother's custody by the department of children and families (department). The victim was placed in a foster home. While the victim and her foster mother were watching a television movie about sexual abuse, the victim ran from the room crying. Because the victim was so overcome with emotion, her foster mother waited until the next day to discuss the subject with her. During the conversation, the victim confided that *325the [petitioner] had raped her and hurt her private parts. The foster mother reported the complaint to a department social worker.
"Subsequently, the victim was interviewed by a forensic specialist, examined by a pediatric nurse practitioner [Judith Moskal-Kanz, who also served as a forensic medical examiner for child sexual abuse and child abuse] and interviewed by a detective, Michael Hunter. [Moskal-Kanz] found a furrow running through the victim's hymen, an injury consistent with penile penetration. Hunter also interviewed the [petitioner] and recorded his statement. According to the [petitioner], subsequent to his having back surgery, he slept in a hospital bed in the living room where he awoke one night to find the victim stroking his penis. The [petitioner] so informed the victim's mother, who beat the victim. One month later, the [petitioner] again awoke and found the victim fondling his penis. He again reported the incident to the victim's mother who administered 'a whupping.' In his statement, the [petitioner] acknowledged having spanked the victim but denied that he ever punched her, hit her, broke her arm or had sexual intercourse with her.
"The [petitioner] was arrested and charged on December 5, 2002. The state filed a twelve count long form information. The theory of defense was that the victim lied about the abuse to avoid being returned to the care of her mother." (Footnotes in original.) State v. Williams , 102 Conn. App. 168, 170-73, 181, 926 A.2d 7, cert. denied, 284 Conn. 906, 931 A.2d 267 (2007). As part of its case-in-chief, "the state called ... Moskal-Kanz ... as a witness. Moskal-Kanz testified ... that scarring on the victim's hymen was consistent with penile penetration and consistent with the victim's description of the intercourse the defendant had forced on her." Id., at 181, 926 A.2d 7.
*326The jury found the petitioner guilty of all counts charged, namely, two counts of sexual assault in the third degree in violation of General Statutes § 53a-72a (a) (1), seven counts of risk of injury to a child in violation of General Statutes (Rev. to 1997 and 1999) §§ 53-21 (1) and (2), and three counts of sexual assault in the first degree in violation of General Statutes § 53a-70 (a) (2). Id., at 170, 926 A.2d 7. The petitioner was sentenced to thirty-five years imprisonment. Id. This court upheld his conviction on direct appeal. Id., at 209, 926 A.2d 7.
The petitioner filed an amended petition for a writ of habeas corpus on May 13, 2015. Relevant to this appeal, the petitioner alleged that his trial attorney, Michael Moscowitz, rendered ineffective assistance of counsel by (1) failing to consult with and *570call as a witness a medical expert with experience evaluating medical evidence in child sexual abuse cases for the purpose of refuting Moskal-Kanz' testimony that her colposcopic examination of the victim revealed trauma to the victim's hymen consistent with sexual abuse, and (2) failing to present testimony from Strugar regarding the petitioner's August, 1999 back surgery and subsequent incapacitation.
Following a three day trial, the habeas court issued a memorandum of decision on March 3, 2016, denying the petition for a writ of habeas corpus. As to both alleged bases for ineffective assistance, the habeas court found that the petitioner had failed to meet his burden of demonstrating that Moscowitz' performance was objectively unreasonable. Following a grant of a petition for certification to appeal, this appeal followed. Additional facts and procedural history will be set forth where necessary.
As a preliminary matter, we set forth our standard of review and the applicable legal principles. "The habeas court is afforded broad discretion in making its factual *327findings, and those findings will not be disturbed unless they are clearly erroneous. ... Historical facts constitute a recital of external events and the credibility of their narrators. ... Accordingly, [t]he habeas judge, as the trier of facts, is the sole arbiter of the credibility of witnesses and the weight to be given to their testimony. ... The application of the habeas court's factual findings to the pertinent legal standard, however, presents a mixed question of law and fact, which is subject to plenary review. ..." (Internal quotation marks omitted.) Thomas v. Commissioner of Correction , 141 Conn. App. 465, 470, 62 A.3d 534, cert. denied, 308 Conn. 939, 66 A.3d 881 (2013).
"To succeed on a claim of ineffective assistance of counsel, a habeas petitioner must satisfy the two-pronged test articulated in Strickland v. Washington , 466 U.S. 668, 687, 104 S.Ct. 2052, 80 L.Ed. 2d 674 (1984). Strickland requires that a petitioner satisfy both a performance prong and a prejudice prong. To satisfy the performance prong, a claimant must demonstrate that counsel made errors so serious that counsel was not functioning as the counsel guaranteed ... by the [s]ixth [a]mendment. ... To satisfy the prejudice prong, a claimant must demonstrate that there is a reasonable probability that, but for counsel's unprofessional errors, the result of the proceeding would have been different. ... Although a petitioner can succeed only if he satisfies both prongs, a reviewing court can find against a petitioner on either ground." (Citations omitted; internal quotation marks omitted.) Breton v. Commissioner of Correction , 325 Conn. 640, 668-69, 159 A.3d 1112 (2017).
"[T]he performance inquiry must be whether counsel's assistance was reasonable considering all the circumstances." Strickland v. Washington , supra, 466 U.S. at 688, 104 S.Ct. 2052. "[J]udicial scrutiny of counsel's performance must *328be highly deferential. It is all too tempting for a defendant to second-guess counsel's assistance after conviction or adverse sentence, and it is all too easy for a court, examining counsel's defense after it has proved unsuccessful, to conclude that a particular act or omission of counsel was unreasonable. ... A fair assessment of attorney performance requires that every effort be made to eliminate the distorting effects of hindsight, to reconstruct the circumstances of counsel's challenged conduct, and to evaluate the conduct from counsel's perspective at the time. Because of the difficulties inherent in making the evaluation, a court must indulge a strong presumption that counsel's conduct falls within the wide range of reasonable professional assistance ...." (Internal quotation marks omitted.) *571Gaines v. Commissioner of Correction , 306 Conn. 664, 679, 51 A.3d 948 (2012).
"[E]ffective assistance of counsel imposes an obligation [on] the attorney to investigate all surrounding circumstances of the case and to explore all avenues that may potentially lead to facts relevant to the defense of the case." (Internal quotation marks omitted.) Id., at 680, 51 A.3d 948. "Nevertheless, strategic choices made after thorough investigation of law and facts relevant to plausible options are virtually unchallengeable; [but] strategic choices made after less than complete investigation are reasonable precisely to the extent that reasonable professional judgments support the limitations on investigation. In other words, counsel has a duty to make reasonable investigations or to make a reasonable decision that makes particular investigations unnecessary." (Internal quotation marks omitted.) Id.
"The reasonableness of an investigation must be evaluated not through hindsight but from the perspective of the attorney when he was conducting it." State v. Talton , 197 Conn. 280, 297-98, 497 A.2d 35 (1985). Trial counsel "need not track down each and every lead *329or personally investigate every evidentiary possibility before choosing a defense and developing it. ..." (Internal quotation marks omitted.) Ricks v. Commissioner of Correction , 98 Conn. App. 497, 502, 909 A.2d 567 (2006), cert. denied, 281 Conn. 907, 916 A.2d 49 (2007). Accordingly, the habeas court cannot second-guess trial counsel's decision not to investigate or call certain witnesses when "counsel learns of the substance of the witness' testimony and determines that calling that witness is unnecessary or potentially harmful to the case ...." Gaines v. Commissioner of Correction , supra, 306 Conn. at 681-82.
Mindful of these principles, we turn to the petitioner's claims on appeal.
I
The petitioner first claims that the habeas court improperly determined that he failed to prove that Moscowitz rendered ineffective assistance by failing to consult with-and, ultimately, call as a witness-a medical expert in order to challenge Moskal-Kanz' testimony that her colposcopic examination of the victim revealed injuries consistent with sexual abuse. We disagree.
The following additional facts are relevant to this claim. As previously set forth, Moskal-Kanz testified at the petitioner's criminal trial that her colposcopic examination of the victim revealed scarring or furrowing on the victim's hymen consistent with sexual abuse. State v. Williams , supra, 102 Conn. App. at 181, 926 A.2d 7. At the petitioner's habeas trial, Jennifer Canter, a child abuse pediatrician, testified that she had examined the victim's colposcopy photographs and determined, contrary to Moskal-Kanz, that the victim had an "absolutely normal exam," a "normal" hymen that exhibited "no scar or furrowing," and that there was "no affirmative evidence of laceration."
*330The habeas court, however, found that the petitioner failed to demonstrate that Moscowitz performed deficiently by failing to consult or call as a witness an expert for purposes of challenging Moskal-Kanz' testimony at the petitioner's criminal trial. The habeas court stated: "Regarding the sexual abuse and medical findings [of Moskal-Kanz], [Moscowitz] testified credibly to consulting with medical experts in practically every case he has tried with medical findings of trauma, although he could not specifically recall consulting with a medical expert in this case. [Moscowitz] had access to all of the relevant medical information in the case as part of the discovery process. He testified *572credibly that if, in his consultation with a medical expert, the consultant opined that the findings were 'normal,' he would either have the witness take the stand in his case-in-chief or use the information to cross-examine the state's witness." Accordingly, the habeas court found: "It is clear ... that ... Moscowitz' performance in ... either relying on his experience and/or consulting with a medical expert was not objectively unreasonable or constitutionally deficient. It would be the very definition of the kind of second-guessing disfavored in the law to allow the petitioner to substitute both the strategic judgments and the newly discovered medical expert [Canter] ... for that of [Moscowitz]."
The petitioner claims that the habeas court improperly concluded that he failed to demonstrate that Moscowitz performed deficiently by "failing to consult with and present [as a witness] a medical expert" to challenge Moskal-Kanz' testimony. We disagree.
The petitioner's claim on appeal is based largely upon a mischaracterization of the record. He grounds his claim that Moscowitz performed deficiently on the factual assertion that Moscowitz "fail[ed] to consult with ... a medical expert" and took Moskal-Kanz' testimony "at face value." Our review of the habeas court's *331memorandum of decision, however, does not reveal any finding that Moscowitz failed to consult with a medical expert in preparation for Moskal-Kanz' testimony. It, instead, reveals that the habeas court credited Moscowitz' testimony that, although he consulted with medical experts in "practically every case" he has tried in which the state presented medical evidence trauma, he could not recall specifically whether he used one to assess Moskal-Kanz' testimony that the victim's hymen exhibited signs of sexual abuse. Indeed, the habeas court found that Moscowitz was not deficient for "either relying on his experience and/or consulting with a medical expert," indicating that it had not made a definitive finding as to whether Moscowitz consulted an expert in the petitioner's case, as opposed to relying on his own experience cross-examining the state's medical witnesses in other cases. (Emphasis added.) Accordingly, the petitioner's claim that Moscowitz performed deficiently by failing to consult with an expert in preparation for Moskal-Kanz' testimony must fail because there is no factual basis for it in the record.4
It appears that the petitioner attempts to avoid this fatal gap in the record by two methods. First, he asserts that "[r]easonable inferences to be drawn from the record indicate that [Moscowitz] did not consult with a medical expert in preparing for the petitioner's criminal trial." It is well settled, however, that "it is not the function of this court ... to make factual findings .... Conclusions of fact may be drawn on appeal only where the subordinate facts found [by the trial court] make such a conclusion inevitable as a matter of law ... or where the undisputed facts or uncontroverted evidence and testimony in the record make the factual *332conclusion so obvious as to be inherent in the trial court's decision ." (Emphasis added; internal quotation marks omitted.) State v. Shashaty , 251 Conn. 768, 783, 742 A.2d 786 (1999), cert. denied, 529 U.S. 1094, 120 S.Ct. 1734, 146 L.Ed. 2d 653 (2000). Nothing either in the habeas *573court's subordinate factual findings or in the evidence adduced at the habeas trial requires , as a matter of law, the conclusion that Moscowitz did not consult with an expert prior to cross-examining Moskal-Kanz. We, therefore, cannot assume the existence of such a fact on appeal.5
Second, the petitioner argues in the alternative that, even if the habeas court did not find that Moscowitz had not consulted with an expert, it also did not find that he had . Because, however, it is the petitioner's burden to prove the factual basis for his ineffective assistance claim; see Gaines v. Commissioner of Correction , supra, 306 Conn. at 679, 51 A.3d 948 ; and not the respondent's burden to prove a negative, the fact that the habeas court did not find that Moscowitz consulted an expert does not help the petitioner. There was no evidence adduced at the habeas trial affirmatively establishing that Moscowitz did not consult an expert. That Moscowitz could not remember specifically his method for preparing for Moskal-Kanz' testimony, which had occurred *333many years prior to the habeas trial-and thus could not rule out the possibility that he relied on his experience and cross-examined Moskal-Kanz without help from an expert, as he did in some cases-does not overcome the strong presumption of constitutionally effective counsel. As the United States Court of Appeals for the Second Circuit has observed, "[t]ime inevitably fogs the memory of busy attorneys. That inevitability does not reverse the Strickland presumption of effective performance. Without evidence establishing that counsel's strategy arose from the vagaries of ignorance, inattention or ineptitude ... Strickland 's strong presumption must stand." (Citation omitted; internal quotation marks omitted.) Greiner v. Wells , 417 F.3d 305, 326 (2d Cir. 2005), cert. denied sub nom. Wells v. Ercole , 546 U.S. 1184, 126 S.Ct. 1363, 164 L.Ed. 2d 72 (2006). Accordingly, the petitioner's claim that Moscowitz performed deficiently because he failed to consult an expert witness must fail.
We also agree with the habeas court that the petitioner failed to meet his burden of establishing that Moscowitz performed deficiently by failing to present testimony from an expert witness at the petitioner's criminal trial in order to refute Moskal-Kanz' testimony. Although Canter testified at the habeas trial that her examination of the victim's colposcopic photographs showed no signs of abnormalities, there are no findings in the habeas court's memorandum of decision that, prior to trial, Moscowitz knew about an expert who, like Canter, disagreed with Moskal-Kanz' opinion.
*574To the contrary, the habeas court credited Moscowitz' testimony that, had he consulted with a medical expert who believed that the victim's hymen was "normal," he would have either called that expert as a witness at trial or used the information to cross-examine Moskal-Kanz. This finding, together with the fact that *334Moscowitz did not call, or otherwise use the information provided by, an expert to refute Moskal-Kanz' testimony regarding the results of the victim's colposcopic examination, leads us to the conclusion that Moscowitz had not encountered such an expert prior to the petitioner's criminal trial. Although Moscowitz could have undertaken a search in hopes of finding such an expert, the constitution does not require trial lawyers to "track down each and every lead or personally investigate every evidentiary possibility before choosing a defense and developing it." (Internal quotation marks omitted.) Gaines v. Commissioner of Correction , supra, 306 Conn. at 683, 104 S.Ct. 2052. Moscowitz testified that his strategy for confronting Moskal-Kanz instead was to establish the possibility that the trauma to the victim's hymen could have been caused by something other than penile penetration; we cannot second-guess that strategy here. Accordingly, the habeas court properly rejected this ineffective assistance claim.
II
The petitioner next claims that the court improperly determined that he failed to prove that Moscowitz performed deficiently by failing to present the testimony of Strugar, the petitioner's neurosurgeon who performed back surgery on the petitioner in August, 1999, to establish that he was incapable of physically or sexually abusing the victim. We are not persuaded.
Regarding the failure to call allegedly exculpatory witnesses, "counsel will be deemed ineffective only when it is shown that a defendant has informed his attorney of the existence of the witness and that the attorney, without a reasonable investigation and without adequate explanation, failed to call the witness at trial." (Internal quotation marks omitted.) Ampero v. Commissioner of Correction , 171 Conn. App. 670, 685, 157 A.3d 1192 (2017). Our cases recognize that a habeas *335court cannot second-guess counsel's decision not to call certain witnesses or pursue potential defenses when he "learns of the substance of the witness' testimony and determines that calling that witness is unnecessary or potentially harmful to the case ...." Gaines v. Commissioner of Correction , supra, 306 Conn. at 681-82, 104 S.Ct. 2052; see, e.g., Mozell v. Commissioner of Correction , 291 Conn. 62, 79, 967 A.2d 41 (2009) (counsel not deficient when decision not to call witness "was entirely consistent with ... theory of defense"); Thompson v. Commissioner of Correction , 131 Conn. App. 671, 694-96, 27 A.3d 86 (decision not to interview and present two witnesses did not render pretrial investigation inadequate because counsel determined that testimony would have been unhelpful to theory of defense), cert. denied, 303 Conn. 902, 31 A.3d 1177 (2011) ; see also Strickland v. Washington , supra, 466 U.S. at 691, 104 S.Ct. 2052 ("when a defendant has given counsel reason to believe that pursuing certain investigations would be fruitless or even harmful, counsel's failure to pursue those investigations may not later be challenged as unreasonable").
In the present case, the habeas court found that Moscowitz had discussed the potential defense of physical incapability with the petitioner but concluded that, in *575light of other facts known to him, such a defense "would not have been helpful as the [jury] was not likely to believe it."6 The habeas court credited Moscowitz' testimony that, despite any diminished physical capability, *336the petitioner was not incapacitated or bedridden during the relevant time period, but, indeed, was sufficiently ambulatory to go out and search for drugs with the victim's mother.7 The habeas court also credited Moscowitz' testimony that the petitioner's purported physical incapacity was not an adequate defense to the charged crimes because it did not account for other evidence that the state was going to present, such as that the petitioner frequently woke the children during the night to rub his back. The theory of defense at trial was instead that the victim fabricated the assaults to avoid being returned to her mother's care. As such, Moscowitz reasonably could have concluded that evidence regarding the petitioner's surgery and subsequent recovery plainly would not have been helpful to that theory of defense. Accordingly, the habeas court properly concluded that the petitioner had failed to rebut the presumption that Moscowitz' decision not to pursue the defense of physical incapacity by calling Strugar as a witness was based on reasonable professional judgment. See Thompson v. Commissioner of Correction , supra, 131 Conn. App. at 691-92, 27 A.3d 86. *337The judgment is affirmed.
In this opinion the other judges concurred.