Mental health issues? She will be out on the street in a month...
About 30 years ago a man named Billy Ferry killed and maimed 30 people standing in lines at a crowded Win-Dixie in Tampa. He brought in a bucket of gasoline and threw it over them and lit a match. It was horrendous. His family had warned police for years that he was crazy and violent and begged for state help. They couldnt afford to put him away themselves. The state, county and city had turned them down because they couldnt afford to keep somebody who was essentially insane locked up for the rest of his life. It wasnt until 30 people were killed and maimed that they did anything.
So, yes, theyll give her a bottle of Damitol and let her go under her parents care. If her parents are really amazing then she may get better. But my guess is that they arent or theyd have picked up some clue before now that this was in the wind.