What's wrong with that? He was acting suspiciously, and he didn't have ID.
Mall patron: "Uh, 9-1-1? Yeah, there's a really old guy here who looks like Vincent Price, only Vincent Price is dead, so either he's a zombie, or it's just some old guy, but either way, he's acting suspiciously, and for a zombie, he's moving pretty spryly, so could you come out here and taser him?"