You must have missed the news that night. His case was so outrageous that it even made the news here in Oz.
Two years ago, at age 16 and three times over the blood alcohol level for an adult (teens are not permitted to drink in the US) Couch ploughed into a broken-down car, killing the driver and three people who had stopped to assist. He injured the passengers in his own car, causing permanent brain damage to one of them.
When the case came to court his lawyer claimed that he suffered from "affluenza". He said that the Couch family was so wealthy and the boy so privileged that he didn't know the difference between right and wrong.
The judge, whose offshore bank account undoubtedly took a turn for the better about that time, said, "Poor kid. Let's give him a good behaviour bond." One of the conditions was that he should not drink and that he should receive counselling.
A couple of weeks ago he was caught on video playing "beer pong" and the clip was posted on (I think) Twitter. He and his mother, realising he would now go to prison, absconded and, a couple of days ago, were arrested in Mexico.
Dad, by this time, seems to have washed his hands of both of them -- at least in public. He doesn't want to go down with the kid.