A Texas teenager who used an "affluenza" defense following a deadly drunken-driving wreck will appear in adult court facing the prospect of more jail time.

Ethan Couch is due Wednesday before a Fort Worth judge who could order more jail time as part of the conditions of his adult probation.

Couch, who turned 19 on Monday, was given 10 years of probation for a June 2013 wreck that killed four people and left two severely injured. The sentence outraged victims' families and prosecutors.

Couch and his mother, Tonya, fled to Mexico in December after a video surfaced online appearing to show Couch at a party where alcohol was being served. Drinking alcohol would be a violation of his probation.

He's been in custody in Texas since January.