Funny that, I once asked the police when we had caught a potential robber at next door and had "detained" him until they arrived. Robber claimed we had detained him illegaly, policeman advised that we were entitled to use reasonable restraint but if we had taken him into a basement and knocked seven bells out of the guy, that would be construed as excessive. Apparently policeman was citing an actual example. And as for being liable if a robber falls and hurts himself whilst robbing your house !!!!

Can I help it if the dog finds that funny and pees on the bugger.