<human>: A good friend of mine and his girlfriend have been together maybe a year and a half now. They both like to drink a lot and push each others drinking limits when they're out places. When he gets drunk, he normally just chills, can be sarcastic but never sincerely mean. When she gets drunk, she gets pissed off, screams, gets mad at him over the simplest of things and it starts a HUGE ordeal (AKA SHE IS CRAZY). Several months ago they had a run in with police where their neighbors called the cops over a noise complaint. The cops came and she just started to cry claiming he hit her. There were not even any red marks anywhere on her body. In October they get drunk again, the cops come due to a noise complaint.. and my friend is bleeding from the head.. from where she BIT him. Visible marks. 

Anyway, after this event, they split up, she was living away from him. He was waiting for his upcoming court date from the dispute in June. He was sentenced to 1 year probation.They saw each other in court and decided to hang out that night. (Dumb on both of their parts). 
Now they are back together, living in their apartment, doing the same as before. She stopped drinking after the whole biting escapade, and just started drinking again this weekend.

We are worried about her causing a scene again one night and getting the cops called, then he will have harsher punishments for breaking probation (which means he could end up in jail for a year). We know it's not our place to say much of anything, if at all, but we're all desperate to help our friend to get out of a toxic relationship... is there anything we can do?

Condense the text into a few key points
<bot>: Friend is in a toxic relationship, involving drinking and issues with police. Is there anything we can say or do to prevent our friend from possibly going to jail?