Criminal negligence is negligence which requires a greater degree of culpability than the civil standard of negligence. The civil standard of negligence is defined according to a failure to follow the standard of conduct of a reasonable person in the same situation as the defendant. To show criminal negligence, the state must prove beyond a reasonable doubt the mental state involved in criminal negligence. Proof of that mental state requires that the failure to perceive a substantial and unjustifiable risk that a result will occur must be a gross deviation from the standard of a reasonable person. Criminal negligence is conduct which is such a departure from what would be that of an ordinary prudent or careful person in the same circumstance as to be incompatible with a proper regard for human life or an indifference to consequences. Criminal negligence is negligence that is aggravated, culpable or gross.
The following is an example of one state's statute defining criminal negligence:
''A person acts with 'criminal negligence' with respect to a result or to a circumstance described by a statute defining an offense when he fails to perceive a substantial and unjustifiable risk that such result will occur or that such circumstance exists. The risk must be of such nature and degree that the failure to perceive it constitutes a gross deviation from the standard of care that a reasonable person would observe in the situation.''