Every jurisdiction (state, local, county) is different. I don't know where you are.@unit321 how long can police hold unto your gun if you voluntarily turn over a gun as part of a legal matter involving an order of protection. Case has already been dismissed and court order issued to release property to the owner.
But, it would be best answered by the police department that is holding on to it. Try to contact someone in the property department. They can answer your question or direct you to someone who can.