California, United States of America
The following excerpt is from The People v. Brinkman, F058292, No. BF122223A (Cal. App. 2010):
The elements of a violation of section 191.5 are: "(1) driving a vehicle while intoxicated; (2) when so driving, committing some unlawful act, such as a Vehicle Code offense with gross negligence, or committing with gross negligence an ordinarily lawful act which might produce death; and (3) as a proximate result of the unlawful act or the negligent act, another person was killed. [Citation.]" (People v. Verlinde (2002) 100 Cal.App.4th 1146, 1159.) "[C]ommitting a lawful act in an unlawful manner simply means to commit a lawful act with negligence, that is, without reasonable caution and care. It follows, then, that in the context of vehicular manslaughter, a killing is unlawful either when one commits a misdemeanor or infraction (an unlawful act, not amounting to a felony) or when one commits a negligent act (a lawful act in an unlawful manner)." (People v. Thompson, supra, 79 Cal.App.4th 40, 53.) However, even if the prosecution "fails to prove that the defendant committed a Vehicle Code violation (i.e., unlawful act), the jury may still convict the defendant of gross vehicular manslaughter 'if it finds that the defendant drove in a grossly negligent manner and, that this conduct was the proximate cause of a death.' [Citation.]" (Ibid.)
"[T]he distinction between an 'unlawful act' and a 'lawful act' done in an 'unlawful manner' tends to disappear in the context of vehicular manslaughter [citations]...[] The act or neglect of duty which satisfies the actus reus element of the offense may in some situations also constitute gross negligence, satisfying that element as well. It is, however, established that the fact that a defendant drives a motor vehicle while under the influence of alcohol and violates a traffic law is insufficient to constitute gross negligence. [Citations.]" (People v. Hansen (1992) 10 Cal.App.4th 1065, 1075.)
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