MS HB139

Creates new crime of "child endangerment" for persons 21+ who drive under the influence of alcohol with a passenger under 21 years old, as a separate offense from standard DUI charges.

First violation is a misdemeanor punishable by up to $1,000 fine and/or up to 1 year imprisonment; second or subsequent violations are felonies punishable by up to $5,000 fine and 1-5 years in state prison.

Requires mandatory use of ignition interlock devices, in-depth diagnostic assessment for alcohol/drug abuse, and mandatory treatment if needed; violators ineligible for sentence reduction, plea bargains, or diversion programs.

Amends existing DUI law to lower blood alcohol concentration threshold from .08% to .05% for second or subsequent DUI offenses for adults over 21.

Effective date is July 1, 2012.