Legal Question in Civil Litigation in Maryland

You will have to file a lawsuit in the District Court of Maryland in your county. To recover your personal belongings, you would file an action known as a replevin. This asks the court to order your "ex" to return those items. The car is a little more complicated since his name is on the title. In the eyes of the law you are joint owners, regardless of who made the payments or who was considered the "owner". This part of your lawsuit would ask the court to appoint a trustee to sell the vehicle and divide the proceeds according to how much each of you contributed to its purchase. You could also sue for provable damages. I know this isn't what you want for the car, but perhaps when he sees the suit, he'll be more reasonable. I suggest you consult with an attorney, because the best way to start is for a lawyer to write a letter outlining the benefits of cooperation and the detriments of not.