The driver was under the influence: Evidence will have to show the driving force was impaired, generally via a blood Alcoholic beverages concentration (BAC) of 0.08% or higher or proof of drug impairment. Lots of 1st introductions on the legal law process happen thanks to drunk driving, DUI, or DWI. https://dui-lawyers.usattorneys.com/former-teen-idol-david-cassidy-arrested-for-second-dui/