but that was the first thing that popped into my mind. bullying. harassment.

i think Charles Manson is a great example of someone who didn't technically commit a crime and is in jail for conspiracy. This is hard considering it was a suicide. but involuntary manslaughter perhaps is the best fit considering the below:

Elements of the Offense

Three elements must be satisfied in order for someone to be found guilty of involuntary manslaughter:

1. Someone was killed as a result of act by the defendant.
2. The act either was inherently dangerous to others or done with reckless disregard for human life.
3. The defendant knew or should have known his or her conduct was a threat to the lives of others.

if nothing else, she admitted she knew what she was doing and she could have stopped it but didn't. even when he tried to stop it, she kept pushing.