Is my wife's green card in jeopardy because of this?

My wife suffers from manic depression and during one of her angry/depressed states, she started to hit, kick, and bite me, bruising me and drawing blood. She wasn't listening to reason, so i threatened to call the police, and when she didn't stop, i did thinking that they could take her to a psychiatric hospital for a few days until she calmed down (which is what happened). She has already been to an initial trial where they told her that she should stay in the hospital until the doctors let her go, but she has another trial date in a couple days to asses her mental condition. She got out of the psychiatric hospital a couple days ago and is saying that she is worried about losing her green card because of the incident.

I have read into it a bit and i found out that if she is arrested for domestic abuse, it may put her green card at risk, and since that happened, i am now worried about it. If i knew about this before, i would have never called the police on her and just toughed out the abuse (and just ran if she grabbed a weapon).

I love her and know that it was just her depression that caused her to act that way and told the police that i did not want to press charges, but due to state law, the state must attempt to press charges. What should i do in this situation? Is it still a possibility that she may lose her green card? It is up for renewal in 8 months.