In State v. Beayon, 158 Vt. 133, 605 A.2d 527 (1992), the Court held that an earlier version of 1091, which provided for prosecution of vehicular homicide, "required, at a minimum, a mens rea of criminal negligence." Id. at 136, 605 A.2d at 528. There, the Court explained that, to prove criminal negligence under 1091, the State must show: (1) the defendant disregarded a risk of injury or death, and (2) the risk was such that - considering the nature and purpose of the defendant's conduct and the circumstances known to him - the defendant's failure to perceive it was a gross deviation from the standard of care that a reasonable person would have exercised in the same situation. See id.