He wasn’t going to play the rest of the season (1 remaining game), the coach was going to be gone at the end of the season, no need to hang around Cleveland. Why not go to Vegas? No problem.
Why should Goofball be restrained by team rules?
His only lifeline is Jerry Jones.
Because as part of the NFL's concussion protocol he is not supposed to be flying or in places with lots of lights?
Because, as a result of being in Vegas, he missed his scheduled appointment in Cleveland Sunday morning re: his concussion protocol?
Because he is a known alcoholic and/or drug addict and Vegas is not where he should be under those circumstances?
Why bother showing up for work at all? Just gets in the way of his partying.