Ethan Couch first made headlines as a teenager for his 'affluenza' defense in a deadly drunk driving case.
Driving under the influence, he killed four people and seriously injured two others.
A juvenile court judge outraged victims' families and anti-drunk driving advocates with his sentence of 10 years' probation.
After fleeing to Mexico with his mother, he was eventually returned to the US in 2015.
A Texas judge in adult court ordered nearly two years of jail time for Couch.