We are happy to have him with us.
The biggest issue is that once the perpetrator is removed and/or charged the victim often petitions the prosecutor and police to drop the charges. The prosecutors I know will generally not do this and will push for a guilty plea or trial. It's hard for the prosecutor to know whether the victim is being manipulated into asking for the charges to be dropped, and regardless, a crime has probably been committed, and in the justice system the plaintiff is the state, not the person who was battered. This can lead to a stand-off where the victim refuses to come to trial to testify, and where the prosecutor has a Hobson's Choice of whether to arrest the victim and jail them until trial to get them on the stand or let the case drop.
DV cases are hard.