A first-time DUI, (or, in some states, "DWI" -- short for "driving while intoxicated") is normally charged as a misdemeanor, not a felony. But if someone was injured as a result of the drunken driving, some states will raise the charge to a felony -- and if the victim dies, some of these states will charge the driver with reckless homicide.

Also, in a number of states, a DUI will be raised to a felony if it is the driver's second, third, or even fourth DUI offense.