Theft? No. I wouldn’t hold anyone else to that given what we know.
Misconduct on the IDACS? Doing do diligence on finding out if it was stolen. Went about it the wrong way. Probably/maybe, place a reprimand in his file at the most.
Firing? **** no. He’s a scalp being thrown out. **** whoever recommended that.
Due diligence refers to actions taken in his official capacity as a law enforcement officer. Was he acting in an official capacity when checking the firearm through IDACS/NCIC?
If the answer is no, he abused his authority in using the government database for his personal purposes. Where's the gun?
If the answer is yes...where's the gun? Why did he have an arrangement with a private company to deal with unclaimed firearms?
Lots of unknown information, but these are legitimate concerns.