I was told that a photo of evidence for logging is enough. I had a case for search warrant, and taking photos of weapons, contraband, and drugs. The physical presentation of weapons for cases is not needed anymore. I understand you wish to keep the guns or drugs. The drugs can be sold by the NPC. I know people continue storing guns. I think there should be a legal process of only detectives who wish to repossess those guns for operations or investigations. The serial number is already enough if someone already possessed in logs. If a patrol bureau like me make search warrant and it was approved, then I think the detective bureau should notified every bust made.
I don't mind a police bank ATM, but I feel it may be abused. Hope my comment make sense.