Criminal homicide refers to the killing of one human being by a fellow human being. The term, in law, embraces all homicides where the perpetrator intentionally killed someone without
legal justification, or accidentally killed someone as a consequence of reckless or grossly negligent conduct. It includes all conduct encompassed by the terms murder, nonnegligent (voluntary) manslaughter, negligent (involuntary) manslaughter, and vehicular manslaughter.
Other /More definition:
Criminal homicide refers to the causing of the death of another person without legal justification or excuse. Criminla homicide is also the illegal killing of one human being by another.