Transcript for Award Offered For Information Leading to Capture of 'Affluenza' Teen
Developing now, the reward offered for America's most wanted teenager. The FBI joining the manhunt for the so-called affluenza teen. Ma Matt Gutman on why his mother may also be in trouble with the law. Reporter: Tonight, $5,000 offered for information leading to Ethan couch. But the 18-year-old may have a huge head start on the authorities. I believe he left after his last appointment with his probation officer. Reporter: Authorities suspect mother and son could have already left the country. They could have chartered boats, planes. They have the money and wealth to get away. Reporter: Investigators say couch packed up this house and disappeared shortly after this video surfaced, purporting to show couch at a boozy party. That toussel-haired teen in that wanted poster and that video, so different from the clean-cut 16-year-old who pled guilty of killing four in a 2013 drunk driving crash. The judge bought it, giving him ten years of probation. When's the last time you recall disciplining Ethan for anything? I don't remember. Reporter: But it's now couch's mother who may learn about consequences. The sheriff telling me he plans to charge her with aiding and abetting a fugitive. When we come back, the major
This transcript has been automatically generated and may not be 100% accurate.