I’m sorry to hear this happened to you. Frustrating dealing with these types of things.
Just an idea and I’m not sure how valuable the stuff stolen is but you might want to try calling those numbers (his buddies) and offer a cash award for information leading to you getting your stuff back. Typically thugs like this don’t keep good company and I’m sure they would probably turn on their “friend” if a significant cash amount is involved. Just an idea…