DALLAS (AP) — The latest on the disappearance of Ethan Couch, the Texas teenager who killed four people in a 2013 drunken-driving wreck and whose lawyer invoked an “affluenza” argument that his wealthy parents coddled him into a sense of irresponsibility (all times local):

10 a.m.

A missing person report has been filed for the mother of the Texas teenager who appears to have fled after apparently violating his probation for killing four people in a 2013 drunken-driving wreck.

Tarrant County district attorney’s office spokesman Sam Jordan said Monday that a relative of Tonya Couch filed the missing person report over the weekend.

Tarrant County Sheriff Dee Anderson says Tonya Couch fled with her son, 18-year-old Ethan Couch.

Investigators want to speak with the teen after a video was posted online of a party he appears to have attended. If it is determined that he was drinking, the probation violation could send him to prison for up to 10 years.

Authorities have issued a $5,000 reward for information leading to Ethan Couch’s apprehension.