Is there some broken law that would enable a citizen’s arrest of this creature?(I cannot even say its name!)
Info on making a citizens arrest.
http://en.wikipedia.org/wiki/Citizen’s_arrest#State_statutes
Lots of nut cases have tried this on personages like Dick Cheney, who belted the guy. Various Bush officials were harassed by attempted citizen’s arrests. It’s mostly a tactic used by lunatic fringe groups.
In my opinion I’d never attempt it as I have no way to restrain somebody and they aren’t going to hang around if you just threaten them. It’s either shoot them or call the cops and let them handle it. The only reason I’d even try it was to protect myself or others from harm. But if they moved towards I’d shoot. (In theory) If they moved away and nobody had been killed, I’d let them go.
A citizen is on shaky ground here. Unless you have money to burn on lawyers, don’t try.