Tonya Couch

"She should know better than that," said Judge Wayne Salvant.

Tonya Couch failed a drug test back in March and was released in May after making bond.

Drunk driver will walk free on 2 April after serving 180 days for each person he killed.

After nearly three weeks on the run, the pair was caught Monday in a Mexican beachside resort town.

No date has been set for the return of the Texas teenager and his mother from Mexico.

Ethan Couch and his mother were found in a Mexican resort town on Monday night.

Couch, 18, was on probation after killing four people while driving drunk.

Authorities believe Tonya Couch might be with her son, the "affluenza" teen who killed four people in 2013.