Just kill them, theres no reason to carry a knife over a certain size unless youre a tradesman, too much namby pamby crap in the world and way waaaaaaaaaaaay too much of this sheite going on, its clear NOTHING is working, Dead dont re offend and there wont be m illions of " innocents" 99.999% of them deserve it. Await the what about the miscarriages etc ....a miniscule fraction.
Keep them in prison, no kill them stop wasting everyones money, they just do it again , and again and again, society has become weak and feeble and the results clear to see