"Affluenza" teen Ethan Couch and his mother have been taken into custody in Mexico in the seaside town of Puerto Vallarta on Monday afternoon.

Eighteen-year-old Couch was reported missing in early December, after he failed to show for a mandatory appointment with his probation officer, prompting authorities to issue the juvenile equivalent of an arrest warrant for him, according to The Associated Press.

Mexican authorities arrested the teen and his mother, Tonya Couch, in the resort town in Jalisco state. Couch and his mother had attempted to disguise their appearance by changing their hair. He dyed his blond hair black.

The Jalisco State Prosecutor's office released photos of Couch an his mother following the arrest.

The Texas teen became a household name in 2013 after killing four people in a drunk-driving wreck. Attorneys for Couch used the "affluenza" defense to help him avoid serving any jail time, arguing the teen's coddled upbringing prevented him from acting responsibly.

Instead of receiving jail time, after pleading guilty to four counts of intoxication manslaughter, Couch was sentenced in juvenile court to 10 years' probation and a brief stay in rehab.

Recently, he was captured on video at a party, where it is believed drinking was going on, a major violation of his probation. If found to be drinking, Couch's probation could be revoked and he could be sentenced to up to 10 years in prison.

The U.S. Marshals Service was offering a reward up to $5,000 for information leading to his capture.

Authorities declined to say if his mother Tonya Couch is now also facing criminal charges.

The "affluenza" condition is not officially recognized as a medical diagnosis by the American Psychiatric Association, and during the Couch proceedings reference to it drew widespread ridicule.

Tarrant County Sheriff Dee Anderson said he believes Couch and his mother fled in November, adding that the teen has never shown remorse for killings he committed.

Upon his capture, Couch's attorneys released a statement saying they would not comment on the situation until after they speak with they client, which would happen after he arrives on U.S. soil.