Murder always requires mens rea. Crimes that do not require mens rea are called "strict liability crimes" but murder is definitely never one of those. >In som

Murder always requires mens rea. Crimes that do not require mens rea are called "strict liability crimes" but murder is definitely never one of those. >In some cases, murder does not require mens rea, when the accused shows "extreme indifference to the value of human life" In such a case, the extreme indifference IS the mens rea. The prosecution must prove the existence of that extreme indifference. Murder without mens rea would mean that the prosecution wouldn't need to even discuss indifference.