Jon Jones was just caught in Vegas I think, stopped by police and banging his head against the car's hood claiming he was detained for no reason.
That was a previous altercation, of which there's been many. The current one is him running away from the scene likely due to drink driving again and leaving a woman (who's apparently not his wife) behind to take the blame. This is the current incident: https://www.youtube.com/watch?v=dI4FfEKxA-E