Given your first post I would have to tell you sadly that there isn't much LE could do about it. Depending on your jurisdiction, you could call for a Civil Standby for LEO's to go with you to know on his door just to talk to him about it. However, since you both are claiming the rifle/money, you gave it to him willingly along with the scope, and you never had a set of contract of when to pay back, etc, then this situation is what we call civil. You could always talk to a lawyer or contact the Sheriff's Office in your county and ask to speak to someone from the Civil Division. Depending on how much money you gave him and how much the scope is worth, it may be much cheaper to let it go, however, I am the type of person that hates that just because it sends the message that that's okay.