Abstract：
Whether a person was voluntarily or intentionally intoxicated at the time of commission of a violent offence is a common question in forensic contexts. While a person who was intoxicated may not be able to form the requisite specific intent to commit some offences, voluntary intoxication usually disentitles a person from an insanity or \"mental impairment\" defence. However, a person may also consume alcohol or use a substance without becoming intoxicated and the presence of alcohol, substances or metabolites of substances in a person\'s urine or blood is not conclusive when the question of intoxication is relevant. A jury (or a judge sitting without a jury) may require expert opinion evidence when cannabis or methamphetamine intoxication are implicated in the alleged offending.
摘要：
一个人在实施暴力犯罪时是自愿还是故意醉酒是法医背景下的常见问题。虽然醉酒的人可能无法形成犯下某些罪行的必要具体意图，自愿中毒通常会使一个人免于精神错乱或“精神损害”防御。然而,一个人也可以饮酒或使用一种物质而不会中毒和酒精的存在，当中毒问题相关时，人的尿液或血液中的物质或物质的代谢物不是决定性的。当涉嫌犯罪涉及大麻或甲基苯丙胺中毒时，陪审团（或没有陪审团的法官）可能需要专家意见证据。
