If I found a box in my backyard that said "Property of <local> police department" - my first step would be to phone them up and ask them to remove it. If they denied that it was theirs then I'd suspect foul play.
It may be a touch naive of me but I'll tend to give the benefit of the doubt to identifying tags.
From The Wire, Prop Joe suggests to Marlow to "steal that shit." If it's local police, they'll come looking for it. If it's the feds, they'll just write it off. "steal that shit and see who comes a callin"
It may be a touch naive of me but I'll tend to give the benefit of the doubt to identifying tags.