The Motive force was underneath the impact: Proof should present the driver was impaired, commonly by way of a blood alcohol focus (BAC) of 0.08% or better or evidence of drug impairment. Legal legal guidelines vary from condition to state, as do prison punishments, but felonies carry a hefty penalty: https://dui-lawyers.usattorneys.com/off-duty-miami-cop-charged-with-dui/