What is Homicide Hy Misadventure?

Legal Definition
The accidental killing of another, where the slayer is doing a lawful act, unaccompanied by any criminally careless or reckless conduct. State v. Miller, 9 Houst (Del.) 564, 32 Atl. 137; U. S. v. Meagher (C. C.) 37 Fed. 879. The same as "homicide per infortunium."
-- Black's Law Dictionary