Conn. Gen. Stat. » Title 53a — PENAL CODE · Chapter 952 — Penal Code: Offenses
Connecticut General Statutes

Conn. Gen. Stat. § 53a-58 (2026)

Criminally negligent homicide: Class A misdemeanor

✓ current as of May 2026
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(a) A person is guilty of criminally negligent homicide when, with criminal negligence, he causes the death of another person, except where the defendant caused such death by a motor vehicle.

(b) Criminally negligent homicide is a class A misdemeanor.

(1969, P.A. 828, S. 59.)

Cited. 174 C. 89. Criminally negligent homicide is a lesser included offense of murder although the state of mind required is different. 180 C. 382. Cited. 181 C. 406; 185 C. 63; 187 C. 6; 195 C. 232; 201 C. 174; 202 C. 520; Id., 629; 204 C. 410; Id., 429; 212 C. 593; 213 C. 579; 214 C. 57; 216 C. 699; 223 C. 273; 226 C. 237; 227 C. 456; 228 C. 118, 127. Trial court improperly refused to instruct jury on this lesser included offense; judgment of Appellate Court in 30 CA 95 reversed. Id., 147. Cited. Id., 281; 231 C. 115; 238 C. 253.

Cited. 17 CA 502; judgment reversed, see 213 C. 579; 24 CA 586; 26 CA 448; 28 CA 388; Id., 771; 30 CA 95; judgment reversed, see 228 C. 147; Id., 232; 32 CA 687; 34 CA 368, see also 233 C. 517; 35 CA 438. Defendant's diminished mental capacity did not prevent her from forming the mental state associated with criminally negligent homicide since the standard is that of the reasonably prudent person. 131 CA 65; judgment affirmed, see 308 C. 835.

Cited. 40 CS 498.

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Notes of Decisions
Cited in 70 cases (6 in the last 5 years), 1977–2026 · leading case: State v. Casey, 513 A.2d 1183 (Conn. 1986).
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State v. Casey, 513 A.2d 1183 (Conn. 1986). · cites it 9× “IV The defendant next claims that the trial court erred in refusing his written request to charge on the lesser included offense of criminally negligent homicide, General Statutes § 53a-58 (a). We shall consider this issue because it is likely to arise on a new trial of this…”
State v. Rodriguez, 429 A.2d 919 (Conn. 1980). · cites it 6× “Therefore, for purposes of this defendant’s sixth amendment right to notice, the *403 question presented to ns is whether the two sections of the first degree manslaughter statute; General Statutes § 53a-55 (a) (1) and (3) ; 14 the second degree manslaughter statute; General…”
State v. Tomasko, 681 A.2d 922 (Conn. 1996). · cites it 6× “On appeal, the defendant claims that: (1) the evidence was insufficient to prove beyond a reasonable doubt that she intended to kill the *255 victim; (2) the trial court improperly refused to instruct the jury on the lesser included offense of criminally negligent homicide in…”
State v. White, 528 A.2d 811 (Conn. 1987). · cites it 6× “White, was charged in a substitute information with three counts of criminally negligent homicide in violation of General Statutes §§ 53a-58 and 53a-3 (14), and with three counts of failing to provide a smoke detector in violation of Connecticut state fire safety code §§ 11-1.”
State v. Salz, 627 A.2d 862 (Conn. 1993). · cites it 6× “This is further underscored because the jury did not have a lesser included offense instruction on negligent homicide; General Statutes § 53a-58; 5 and, therefore, did not have the benefit of the comparison.”
State v. Sivri, 646 A.2d 169 (Conn. 1994). · cites it 4× “The defendant requested that the trial court charge the jury on the following lesser included offenses: manslaughter in the first degree in violation of General Statutes § 53a-55 (a) (1) and (3), 11 manslaughter in the second degree in violation of General Statutes § 53a-56 (a)…”
State v. Bunkley, 522 A.2d 795 (Conn. 1987). · cites it 5× “General Statutes § 53a-58 (a) provides that “[a] person is guilty of crimi *640 nally negligent homicide when, with criminal negligence, he causes the death of another person, except where the [actor] caused such death by a motor vehicle.”
State v. Smith, 563 A.2d 671 (Conn. 1989). · cites it 6× “The defendant had requested the court to charge, in addition, that the jury consider the lesser included offenses of manslaughter in the second degree; General Statutes § 53a-56; 6 and criminally negligent homicide.”
State v. Falby, 444 A.2d 213 (Conn. 1982). · cites it 4× “" The issue before us, then, is whether the evidence at trial, including the defendant's confession, can support a conviction for manslaughter in the second degree; General Statutes § 53a-56 (a) (1); or criminally negligent homicide.”
State v. Tate, 773 A.2d 308 (Conn. 2001). · cites it 4× “2 On its own motion, the trial court also instructed the jury on the lesser included offense of manslaughter in the second degree in violation of General Statutes § 53a-56 (a) (l), 3 and, at the defendant’s request, the trial court also charged the jury on criminally negligent…”
State v. Tomlin, 835 A.2d 12 (Conn. 2003). · cites it 4× “7 II We now consider the defendant’s claim that the trial court improperly declined to instruct the jury on manslaughter in the second degree; see General Statutes § 53a-56 (a) (l); 8 and criminally negligent homicide; see General Statutes § 53a-58 (a); 9 as lesser included *628…”
State v. Edwards, 570 A.2d 193 (Conn. 1990). · cites it 5× “Accordingly, the defendant filed procedurally proper requests for the jury to be charged on his defense of intoxication as a defense to first degree murder and on the lesser included offenses of first degree manslaughter pursuant to General Statutes § 53a-55 (a) (3), 3 second…”
Show all 70 citing cases →
— Conn. Gen. Stat. § 53a-58(a) — 1 case
State v. Patterson, 29 A.3d 467 (Conn. 2011).
Annotations are extracted automatically from the opinions in the Syfert caselaw corpus and ranked by authority, recency, and treatment. Dots show Syfertize treatment of the citing case itself.