Fairly simple problem. In New York state, a police officer seized my property for his personal use. He didn't report it to his department as seized. He didn't actually tell me he was taking it; he merely grabbed an item that I had on my person, held it for about half an hour, and returned it to me less one of its vital components, the loss of which I observed immediately thereafter. His department later confirmed that he reported no property had been seized from me.
Now I want my property back.
How do I go about getting that? In the event that the item is not easily replaceable, how can I compel him to say what he did with it so that it can be tracked down, assuming it hasn't been destroyed or disposed of already?

