Colorado has three statutes that make driving under the influence of alcohol or drugs a felony crime. These three felony DUI offenses are: CRS 42-4-1301 – Fourth-time DUI CRS 18-3-205 – DUI causing serious injury CRS 18-3-106 – DUI causing death First-, second-, and third DUI convictions are prosecuted as misdemeanors as long as there are …