'Affluenza' Teen Wanted by US Marshals for Alleged Probation Violation

— -- The teenager whose drunk driving trial included a defense witness saying that he was afflicted with "affluenza" is being sought by federal authorities for a probation violation, authorities said.

The U.S. Marshals have issued a wanted poster for Ethan Couch, who police believe has violated the conditions of his probation, and are offering a $5,000 reward in exchange for the 18-year-old's whereabouts.

Couch was convicted of four counts of intoxication manslaughter in 2013 but was not sentenced to any jail time; instead he was given 10 years probation -- a punishment considered a mere slap on the wrist by critics, and one that outraged the victims' families.

It was not clear how long he's allegedly been at large.