Opinion
NORCOTT, J.
The sole issue in this certified appeal is whether the Appellate Court, in affirming the defendant’s conviction of murder in violation of General Statutes § 53a-54a (a),1 properly determined that the trial [455] court was not required to instruct the jury on the lesser included offense of manslaughter in the first degree in violation of General Statutes § 53a-55 (a) (l).2 We conclude that the trial court was required to give the instruction and, accordingly, we reverse the judgment of the Appellate Court.
The defendant was charged with one count of murder in violation of § 53a-54a (a), one count of sexual assault in the first degree in violation of General Statutes § 53a-70 (a) (l),3 one count of sexual assault in the second degree in violation of General Statutes § 53a-71 (a) (3),4 and one count of sexual assault in the third degree in violation of General statutes § 53a-72a (a) (l).5 After a jury trial, the defendant was convicted of murder and sexual assault in the first degree and third degree, and was sentenced to a total of sixty years imprisonment. Thereafter, the defendant appealed from the judgment [456] of conviction to the Appellate Court, which affirmed the defendant’s convictions. State v. Smith, 65 Conn. App. 126, 128, 782 A.2d 175 (2001).6 We then granted the defendant’s petition for certification to appeal, limited to the following issue: “Did the Appellate Court properly conclude that the trial court was not required to instruct the jury on the lesser included offense of manslaughter in the first degree?” State v. Smith, 258 Conn. 930, 783 A.2d 1032 (2001).
The jury reasonably could have found the following relevant facts, as set forth in the opinion of the Appellate Court. “In the evening of May 12, 1995, the defendant went to a bar in Bridgeport, where he consumed several beers and brandy, and met Timothy Solek. The two left for Solek’s apartment, where they consumed more alcohol. They later returned to the bar. They then went to the home of the victim, an acquaintance, and the three played cards.
“At some point in the evening, the defendant left the room to use the bathroom. When he returned, he found the victim and Solek arguing and pushing each other. The victim yelled at Solek to leave. The defendant then grabbed the victim and placed her in a choke hold. The victim resisted, gasped for air and, finally, fell to the floor.
“Solek then kicked the victim in the head repeatedly and hit her in the head with a clothes iron three or four times. He also stabbed her repeatedly with a can opener. The defendant took off his pants and fondled the victim’s breasts. Solek had taken off his pants, covered the victim’s face with a towel, masturbated, and forcibly had anal and vaginal intercourse with her. Before the defendant and Solek left, the defendant took the vic[457] tim’s Walkman. They returned to Solek’s apartment, where the defendant borrowed a pair of pants. At about 2:30 a.m., Solek called the police and accompanied the responding officer to the victim’s apartment, where she was found dead.
“The defendant subsequently was arrested at his girlfriend’s home, where police recovered a pair of his jeans covered with the victim’s blood. The victim’s blood also was found under the defendant’s fingernails and on his left hand. The defendant gave a signed, written statement at the police station. In the statement, the defendant admitted that he and Solek had been at the victim’s apartment, that he got involved in a fight between Solek and the victim, and that he strangled her.7 When the police detectives who took the defendant’s statement asked whether he had killed the victim, the defendant stated, ‘I guess you could say we both did, but not on purpose.’ He further admitted in the statement that he took off his pants and that, although he did not have sex with the victim, he fondled her breasts.
“At trial, the state put on evidence that showed that the victim’s death was caused by strangulation.8 The [458] defendant testified in his own behalf. [See footnote 24 of this opinion.] The jury, however, found him guilty, and [the defendant’s] appeal followed.” State v. Smith, supra, 65 Conn. App. 128-30.
On appeal to the Appellate Court, the defendant claimed that the trial court improperly had refused to instruct the jury on the lesser included offense of manslaughter in the first degree.9 Id., 128. The Appellate Court applied the conjunctive four prong test set forth by this court in State v. Whistnant, 179 Conn. 576, 588, 427 A.2d 414 (1980), under which “a defendant is entitled to an instruction on a lesser included offense if he can demonstrate compliance with each of four conditions: (1) an appropriate instruction is requested by either the state or the defendant; (2) it is not possible to commit the greater offense, in the manner described in the information or bill of particulars, without having first committed the lesser; (3) there is some evidence, introduced by either the state or the defendant, or by a combination of their proofs, which justifies conviction of the lesser offense; and (4) the proof on the element or elements which differentiate the lesser offense from the offense charged is sufficiently in dispute to permit the jury consistently to find the defendant innocent of the greater offense but guilty of the lesser.” (Internal quotation marks omitted.) State v. Smith, supra, 65 Conn. App. 130; State v. Ray, 228 Conn. 147, 152, 635 A.2d 777 (1993). Although both parties conceded that the second prong of the Whistnant test had been satisfied, the state argued that the defendant failed to meet the first, third and fourth prongs of the test. State v. Smith, supra, 133.
[459] The Appellate Court declined to address the state’s argument that, by not providing “in his request to charge any discussion of the evidence that would support an instruction on manslaughter,” the defendant failed to satisfy the first prong of Whistnant. Id. The Appellate Court, relying on its decision in State v. Smith, 35 Conn. App. 51, 60 n.5, 644 A.2d 923 (1994), concluded that, because the state did not make that claim in the trial court, it could not do so on appeal. State v. Smith, supra, 65 Conn. App. 133.
The Appellate Court then shifted its analysis to the third and fourth prongs of Whistnant. It relied on its decision in State v. Sotomayor, 61 Conn. App. 364, 379, 765 A.2d 1, appeal dismissed, 260 Conn. 179, 794 A.2d 996, cert. denied, 537 U.S. 922, 123 S. Ct. 313, 154 L. Ed. 2d 212 (2002), for the proposition that, “[f]or the third and fourth conditions of Whistnant to be satisfied, there must be sufficient evidence, introduced by either the state or the defendant, or by a combination of their proofs, to justify a finding of guilt of the lesser offense.” (Emphasis in original; internal quotation marks omitted.) State v. Smith, supra, 65 Conn. App. 133. Applying this rule, the court rejected the defendant’s contention that his statement to the police, as well as the lack of any evidence of planning or premeditation, constituted sufficient evidence to justify an inference that the defendant “had intentionally beaten the victim into submission so that he could sexually assault her and that this resulted in her death.” Id., 133-34. The Appellate Court, instead, placed greater emphasis on the defendant’s position at trial, namely, that “he not only did not intend to kill the victim, but that he also never intended to injure her,” than on the inferences that could be drawn from his statement to the police.10 Id., 134. Ultimately, [460] the Appellate Court concluded, even “[v]iewing the evidence in the light most favorable to the defendant . . . his state of mind was not sufficiently in dispute so as to entitle him to a jury instruction on manslaughter in the first degree”; id.; and, accordingly, affirmed the trial court’s judgment of conviction. Id., 144. This certified appeal followed.
I
In State v. Corbin, 260 Conn. 730, 744—46, 799 A.2d 1056 (2002), we reiterated the well established principles governing whether a defendant is entitled to a lesser included offense instruction under the Whistnant test: “This court repeatedly has recognized that ‘[t]here is no fundamental constitutional right to a jury instruction on every lesser included offense . . . .’ State v. Whistnant, [supra, 179 Conn. 583]. Rather, the right to such an instruction is purely a matter of our common law. ‘A defendant is entitled to an instruction on a lesser [included] offense if, and only if, the following conditions are met: (1) an appropriate instruction is requested by either the state or the defendant; (2) it is not possible to commit the greater offense, in the manner described in the information or bill of particulars, without having first committed the lesser; (3) there is some evidence, introduced by either the state or the defendant, or by a combination of their proofs, which justifies conviction of the lesser offense; and (4) the proof on the element or elements which differentiate the lesser offense from the offense charged is sufficiently in dispute to permit the jury consistently to find the defendant innocent of the greater offense but guilty of the lesser.’ Id., 588.
“ ‘In considering whether the defendant has satisfied the requirements set forth in State v. Whistnant, supra, [461] 179 Conn. 588, we view the evidence in the light most favorable to the defendant’s request for a charge on the lesser included offense. ... On appeal, an appellate court must reverse a trial court’s failure to give the requested instruction if we cannot as a matter of law exclude [the] possibility that the defendant is guilty only of the lesser offense.’ . . . State v. Tomasko, 238 Conn. 253, 260-61, 681 A.2d 922 (1996).”
The Whistnant test is conjunctive, requiring satisfaction of all four prongs. The defendant claims that he has done so. The state contends that the defendant failed to satisfy the first, third and fourth prongs of the test. Inasmuch as each prong has spawned its own voluminous body of case law, we consider separately the claims of the state and the defendant under each prong.11 We conclude that the defendant satisfied all four prongs, and, accordingly, that the Appellate Court improperly determined that the defendant was not entitled to have the trial court instruct the juiy on the lesser included offense of manslaughter in the first degree.
II
The first prong of the Whistnant test requires that either the state or the defendant request “an appropriate instruction.” State v. Whistnant, supra, 179 Conn. 588. The state claims that the defendant’s written request to charge did not satisfy the first prong of the Whistnant test because, by not complying with the requirements of Practice Book § 42-18,12 the request did not ade[462] quately alert the trial court to evidence that supported his proposed lesser included offense instruction. The defendant claims that his written request, taken together with a colloquy with the trial court and a post-instruction exception, satisfies the first prong of the Whistnant test. We agree with the defendant.13
The following additional facts are relevant to the disposition of the defendant’s claim. The defendant filed a written request to charge with the trial court.14 Three days later, the trial court conferred with the state and [463] the defendant about the proposed jury instructions. At this conference, both parties and the court engaged in a lengthy discussion about the proposed manslaughter charge, including its factual basis and the applicable law.15 The state informed the court and defense counsel [464] that it had not received a copy of the defendant’s proposed charge. Although the trial court inquired about why the state had not received a copy of the proposed charge, the state represented that it could proceed at the conference without it. After some discussion about [465] the facts of the case and the differing mental states of murder and manslaughter as applied to the evidence of the defendant’s conduct, the court denied the defendant’s request to charge the jury on manslaughter in the first degree as a lesser included offense. After the jury was instructed, the defendant took an exception to the trial court’s refusal to charge on the lesser included offense of manslaughter in the first degree.16
It is well settled that, “[a] proposed instruction on a lesser included offense constitutes an appropriate instruction for purposes of the first prong of Whistnant if it complies with Practice Book [§ 42-18]. . . . We previously have held, in the context of a written request to charge on a lesser included offense, [that the] requirement of [§ 42-18] is met only if the proposed request contains such a complete statement of the essential facts as would have justified the court in charging in the form requested.” (Citation omitted; internal quotation marks omitted.) State v. Corbin, supra, 260 Conn. 746-47; accord State v. McIntosh, 199 Conn. 155, 158-59, 506 A.2d 104 (1986). For example, in Corbin, we concluded that the defendant did not satisfy the first prong of Whistnant because his written request was “confusing”; State v. Corbin, supra, 747; as it did not follow the rules of § 42-18 requiring a separate paragraph for each requested instruction and a “complete statement of the essential facts to justify the charge as requested.” Id., 746. This court favors adherence to the prescriptions of § 42-18 to further that section’s purpose of making instructional requests less confusing. Id. Indeed, we have stated that “[w]hile [we do] not favor [466] unyielding adherence to rules of procedure where the interests of justice are thereby disserved . . . the ever increasing refinement of our law justifies cooperation of counsel in stating requests for jury instruction. The minor burden of cooperation imposed by [Practice Book § 42-18] is neither unreasonable nor novel.” (Internal quotation marks omitted.) Id., 747.
In the present case, as the defendant conceded at oral argument before this court, the written request to charge, though containing ample citations to relevant legal authority, lacked a statement of the essential facts and, therefore, did not comply completely with the provisions of Practice Book § 42-18. This does not mean, however, that the defendant has not satisfied the first prong of Whistnant. Although strict compliance with the provisions of § 42-18 is certainly the least perilous method of satisfying Whistnant's first prong, failure to do so is not, by itself, fatal to the defendant’s claim. We have deemed the first prong of Whistnant satisfied when the record indicates that “the trial court knew the precise point to which the defendant wished to call attention.” (Internal quotation marks omitted.) State v. Arena, 235 Conn. 67, 77, 663 A.2d 972 (1995); id. (noting written request adequately drew trial court’s attention to relevant facts when legal basis for lesser included offense charge had been discussed previously in chambers; emphasizing that “trial court was aware of the defendant’s request prior to formulating its charge and thus was afforded the time to scrutinize the requests”). Indeed, even partial compliance with § 42-18, accompanied by substantial additional support in the record from either party, such as detailed colloquies with the court and opposing counsel and a postcharge exception, will also satisfy the first prong of Whistnant. This is true as long as the trial court is informed adequately of the factual and legal bases for the instructional request. Compare State v. Ray, supra, 228 Conn. 153 n. 7 (first [467] prong satisfied despite written request lacking statement of supporting evidence when defendant took post-charge exception; noting “statement by the trial judge that he had reviewed the evidence and decided not to give the requested charge”), State v. Herring, 210 Conn. 78, 105 n.25, 554 A.2d 686, cert. denied, 492 U.S. 912, 109 S. Ct. 3230, 106 L. Ed. 2d 579 (1989) (first prong satisfied despite noncompliant written instruction when “defense counsel, upon inquiry to the trial court, had been reassured that he need not file a formal, written request to charge and that his oral request sufficed”), State v. Faria, 47 Conn. App. 159, 182-83, 703 A.2d 1149 (1997), cert. denied, 243 Conn. 965, 707 A.2d 1266 (1998) (first prong satisfied despite incomplete factual statement in written request when trial court was aware of “legal and factual basis for the request to charge” via off-record chambers conference and on-record colloquy) and State v. Preston, 46 Conn. App. 778, 783, 700 A.2d 1190 (1997) (“defendant’s written request to charge and the colloquy between the court and defense counsel complied with the first prong of Whistnant and sufficiently alerted the trial court of the basis for the request”), rev’d on other grounds, 248 Conn. 472, 728 A.2d 1087 (1999), with State v. Corbin, supra, 260 Conn. 746-47 (first prong not satisfied when written request failed to comply with Practice Book § 42-18; no indication that trial court was otherwise aware of factual or legal bases for defendant’s request).17
In the present case, despite the deficiency in the written request, the colloquy among the trial court, the [468] state and the defendant indicates that the trial court was aware of and understood the facts underlying the defendant’s request for the lesser included manslaughter instruction.18 The trial court, during the colloquy, acknowledged the significance of the defendant’s statement in the context of the request. Moreover, after the jury was charged, the defendant took an exception, further alerting the trial court to his disagreement with the refusal to give the lesser included offense instruction. Because the record in the present case demonstrates that the trial court’s attention amply was drawn to the factual and legal bases for the request to charge on the lesser included offense, we conclude that the defendant requested an “appropriate instruction,” thereby satisfying the first prong of State v. Whistnant, supra, 179 Conn. 588.19
III
Despite being conceptually distinct parts of the Whistnant formulation, the third and fourth prongs are subject to the same evidentiary analysis. State v. Crafts, [469] 226 Conn. 237, 250-51, 627 A.2d 877 (1993). We will, therefore, analyze them simultaneously. The third prong of Whistnant requires that “there [be] some evidence, introduced by either the state or the defendant, or by a combination of their proofs, which justifies conviction of the lesser offense . . . .” State v. Whistnant, supra, 179 Conn. 588. The fourth prong requires that “the proof on the element or elements which differentiate the lesser offense from the offense charged is sufficiently in dispute to permit the jury consistently to find the defendant innocent of the greater offense but guilty of the lesser.”20 Id.
The defendant, relying on this court’s decision in State v. Sivri, 231 Conn. 115, 138-40, 646 A.2d 169 (1994), claims that his statement to the police, offered into evidence by the state, is sufficient to “prove that he acted with a lesser intent than that of the specific intent to kill” and sustain a conviction for manslaughter in the first degree. The state contends that the defendant has not satisfied the third or fourth prongs of Whistnant because he failed to advance any arguments at trial that he had acted with intent to cause serious physical injury, positing instead general denials of any criminal intent or responsibility for the victim’s death. The state also claims that the defendant’s reliance on Sivri is misplaced because, when that case was argued before this court, the exact manner of the victim’s death was unknown. We agree with the defendant.
“In State v. Rasmussen, 225 Conn. 55, 65-73, 621 A.2d 728 (1993), we . . . reviewed the standard of evi[470] dence required to satisfy the [third and fourth prongs] of the Whistnant test. We there held that ‘there must be sufficient evidence, introduced by either the state or the defendant, or by a combination of their proofs, to justify a finding of guilt of the lesser offense.’ ” State v. Crafts, supra, 226 Conn. 251. Although “[we] expressly [reject] the proposition that a defendant is entitled to instructions on lesser included offenses based on merely theoretical or possible scenarios”; State v. Arena, supra, 235 Conn. 78; we will, however, “consider the evidence available at trial in- the light most favorable to the defendant’s request. . . . [T]he jury’s role as fact-finder is so central to our jurisprudence that, in close cases, the trial court should generally opt in favor of giving an instruction on a lesser included offense, if it is requested. . . . Otherwise the defendant would lose the right to have the jury pass upon every factual issue fairly presented by the evidence.” (Citations omitted; internal quotation marks omitted.) State v. Rasmussen, supra, 68.
Lesser included offense instructions are frequently appropriate in cases when the defendant is charged with murder. This is because “[t]he critical element distinguishing murder from its lesser included offenses is intent, ‘often the most significant and, at the same time, the most elusive element of the crime charged.’ State v. Rodriguez, [180 Conn. 382, 404, 429 A.2d 919 (1980)]. We must determine if the ‘evidence suggests at least a possibility’ that the defendant acted with a lesser intent than that of the specific intent to kill. State v. Falby, 187 Conn. 6, 30, 444 A.2d 213 (1982). If ‘we cannot as a matter of law exclude this possibility’; id.; then the defendant was entitled to lesser included offense instructions.” State v. Sivri, supra, 231 Conn. 138-39.
To gain a better illustration of the degree of proof needed to satisfy the third and fourth prongs of the Whistnant test, we begin our analysis by parsing this [471] court’s opinion in State v. Sivri, supra, 231 Conn. 137-40. In Sivri, the defendant appealed from a murder conviction, claiming that the trial court improperly refused to instruct the jury on lesser included offenses, including manslaughter in the first degree. Id., 137. In that case, the victim’s body and any evidence of it was still missing at the time of trial.21 Id., 125. Large, partially cleaned, quantities of blood that matched the victim’s blood type, the victim’s earring, and hairs similar to those of the victim, were found in the defendant’s home three days after her disappearance.22 Id., 121-24. The victim’s blood also was present in the defendant’s car. See footnote 22 of this opinion. Moreover, beyond the defendant’s attempts to conceal or destroy evidence of [472] the act, the state presented additional evidence relevant to the defendant’s consciousness of guilt, including his flight and subsequent use of several aliases. State v. Sivri, supra, 125-26.
This court concluded therein that, although there was sufficient evidence to prove, beyond a reasonable doubt, that the defendant had the specific intent to cause the victim’s death,23 the defendant had, nevertheless, satisfied the third and fourth prongs of Whistnant. Id., 139-40. Noting the critical nature and fine distinctions of the intent element in differentiating the various homicide crimes, this court “agree [d] with the defendant that the evidence was such as to permit the jury to infer that there was also a possibility that there was a sudden or spontaneous incident . . . resulting in the unintended death of [the victim].” (Internal quotation marks omitted.) Id., 139. The court held that, even with the copious amounts of the victim’s blood, “and the setting of the injury—a family room in a home, where one does not expect accidental conduct to produce an injury causing the loss of that much blood—a jury could reasonably infer that the defendant acted with an intent to cause the victim serious injury . . . .’’Id. The court also stated that “the evidence of intent to kill was not overwhelming. . . . [P]rior cases in which this court has held that the defendant was not entitled to any lesser included offense instructions are distinguishable .... For example, in State v. Crafts, supra, 226 Conn. 251, there was evidence of prior planning and preparation—the defendant had arranged for the rental of a woodchipper to dispose of the victim’s body prior to causing the victim’s death, making the defendant’s claim of a ‘sudden confrontation . . . too speculative [473] to put the issue of intent sufficiently in dispute.’ ” State v. Sivri, supra, 231 Conn. 140.
We conclude that, as in Sivri, in the present case, there was sufficient evidence to support a reasonable inference by the jury that a sudden or spontaneous incident occurred, resulting in the victim’s unintended death. Moreover, we further agree with the defendant’s contention that, unlike Sivri, in the present case, affirmative evidence actually was introduced to support that theoiy, namely, the defendant’s testimony24 and his statement to the police about the alcohol-fueled altercation and struggle with the victim. Indeed, as the Appellate Court noted in its opinion: “When the police detectives who took the defendant’s statement asked whether he had killed the victim, the defendant stated, ‘I guess you could say we both did, but not onpurpose.’ ” (Emphasis added.) State v. Smith, supra, 65 Conn. App. 129.
[474] The state claims that the defendant’s reliance on Sivri is misplaced because, unlike that case, wherein the manner of death was unknown, the manner of the victim’s death in the present case, namely, strangulation, is inconsistent with a sudden or spontaneous killing. We disagree with the state because, on the evidence in this record, particularly the defendant’s statement, we cannot conclude, as a matter of law, that the evidence does not suggest “at least a possibility that the defendant acted with a lesser intent than that of the specific intent to kill.” (Internal quotation marks omitted.) State v. Sivri, supra, 231 Conn. 139; State v. Falby, supra, 187 Conn. 30. Indeed, this court’s decision in Falby is particularly instructive on this point. In Falby, this court held that, in a murder trial wherein the defendant was convicted of killing a child by manual strangulation, the trial court improperly refused to instruct the jury on the lesser included offenses of second degree manslaughter and criminally negligent homicide. State v. Falby, supra, 30.25 We find Falby especially persuasive because, in that case, when the defendant claimed that during the act of strangling, he became scared and threw the child, we concluded that the “evidence suggested] at least a possibility that the defendant acted recklessly or with criminal negligence in leaving a child with her face in the dirt following another such attack.” (Emphasis added.) Id.; compare State v. Rasmussen, supra, 225 Conn. 72 (first degree manslaughter instruction not justified because “[i]t requires nothing more than common sense to conclude that slashes to the neck of a conscious victim that severed the victim’s jugular vein, trachea, larynx and esophagus and the impalement of the victim by a spear are evidence of intent to kill rather than mere recklessness or intent to injure seriously”) and State v. Herring, supra, 210 Conn. [475]*47593-94, 106 (defendant’s intent not sufficiently in dispute when victim’s head, with fatal shotgun wound, found wrapped in plastic).
The state also contends that the defendant failed to advance any arguments at trial in support of his contention that he only intended to injure, and not kill, the victim. According to the state, the defendant argued that he was not responsible for the victim’s death; therefore, the only possible conviction could be for murder.26 We disagree with this contention, and conclude that the Appellate Court’s emphasis on the defendant’s position at trial that “he not only did not intend to kill the victim, but that he also never intended to injure her”; State v. Smith, supra, 65 Conn. App. 134; rather than on the inferences that could be drawn from his statement to the police, was improper. So long as the evidence reasonably can “justify a finding of guilt of the lesser offense”; State v. Rasmussen, supra, 225 Conn. 68; a “defendant’s claim of innocence [does] not automatically preclude him from requesting an instruction on lesser included homicides that require a less serious degree of culpable intent.” (Internal quotation marks omitted.) Id., 65; see also State v. Edwards, 214 Conn. 57, 65, 570 A.2d 193 (1990) (“[t]here is . . . nothing inherently inconsistent with the defendant’s pressing for an acquittal based on a theory of pure accident while simultaneously requesting instructions on lesser included offenses within the crime of murder”); State v. Green, 207 Conn. 1, 14, 540 A.2d 659 (1988) (“[t]he fact that a defendant denies having any involvement in [476] a crime . . . does not necessarily preclude him from obtaining an instruction on a lesser included offense if there are facts in evidence that would reasonably support such an instruction”). We conclude, therefore, that the Appellate Court improperly determined that the defendant was not entitled to a jury instruction on the lesser included offense of manslaughter in the first degree.
The judgment of the Appellate Court is reversed and the case is remanded to that court with direction to reverse the judgment of the trial court, and to remand the case to that court for a new trial.
In this opinion BORDEN and KATZ, Js., concurred.