what happens if i file a restraining order against an in law that lives with me?

If possible, I would talk with your husband about his son’s violence and that you cannot continue to have him in your lives any longer. If you cant have that type of conversation with your husband but have decided that you cannot continue to have him in your house or in contact with you, then you have the right to file a domestic violence complaint against him based on physical violence to you and verbal abuse and harassment. For your purposes, the more material you can provide the police with about incidents of violence against you and against your husband (in your presence) the better starting with the most recent incident. I would sit down and write out a detailed history of the sons violent history working backwards and a complete listing of as many violent incidents that you can recall where he was physically violent to you, pushing you, getting in your face, cursing at you, punching holes in walls, breaking objects in your presence with as much detail as possible as to the date of the incident, where it occurred and what he said to you of a threatening nature. Then compile the exact same list of incidents where he did the same thing to your husband (when you were present to observe it). Critical to a domestic violence complaint is a predicate act (recent incident that caused you to seek police intervention). With a recent incident, you can then provide the history of other bad actions by the son against you and your husband as part of the history. To file a domestic violence complaint, simply go to your local police station and tell them that you want to file a domestic violence complaint against your husband’s son who has lived with you, stating that you are fearful for your safety as a result of his violent outbursts directed towards you and your husband. Bring your list with you and make sure that you include everything from your history in the complaint even if the officer has to sit and write for a while. Do not shortcut the process by excluding violent incidents.