This was nothing so obvious. A husband/wife dispute that wound up with him busted on a domestic violence charge and her in on drug charges. His domestic violence was basically stopping his wife from driving by physically removing the keys from her hand. He wanted to stop her because she was whacked out of her mind from her Vicoden stash. We had to sit through two days of testimony from the arresting officer, toxicology reports, social workers, etc.
There was no evidence of any sort of physical injury. Plenty of evidence that she wasn't fit to drive, though, and her own testimony was that he had taken the keys from her hand, after which she called 911.
The DA had a campaign promise for zero tolerance on domestic violence cases, so there we were.
Lesson: Never try to stop a drunk or druggie from driving. The local DA will have you up on charges. Let them go kill themselves and some random strangers.