Do they make those live traps big enough for that? Trap 'em... drive 'em way out into the country and let them go...
To take care of varmints at his place, my Dad used to trap them in a Hav-A-Hart trap, then throw the whole trap into his pond for a while, pull it out with a rope, and dispose of the body.
Use your own judgment about whether this technique is appropriate for the current situation.