I think if the guy that found his property in that man's garage had a photograph of all your stuff at that man's house and a picture of him, he would have problems explaining that to the judge. The police are so limited in what they can do themselves. But the judge has power. You would start this by going to judge and simply explain the situation to him. Show him the pictures of your crap. If he believes you he has the power to make things go your way. Messing the police was not a dead end. If he still has your stuff, then it's not too late to go talk to the judge. It's not too late anyway. You should have his name and address. The judge will need that to cut any orders on it.
The police have very limited power to solve ****. Go see the man in the black dress for real power.