prove what?
I never once implied he was breaking the law, in fact I don't know what the private property laws in his state are
Like I said earlier, im no lawyer or Leo, and I don't know the laws of his state, im basing my arguments on what little info the OP gave.
Up until that date the gun still belongs to the tenant, what I am saying is that the LEO may have thought it best to bring the gun in, and keep it at the station until the owner forfeits it. At which time the OP can come and get it, yes the cruddy ffl deal sucks.
remember, there were drug/para at the residence along with the gun, which also belonged to the ex tennants