I would also be in favor of bans (like not allowed in a city anymore) and "Vogelfreiheit" if it helps to get rid of prison.

Vogelfreiheit was a popular concept in Europe in the middle ages. It literally means outlaw, but many dont remember what outlaw meant in the past. You cant be defended by law, anybody can kill you and will not get prsecuted for it.

When you murdered someone with evil intentions, you lose your human rights. A fair punishment I would say.

Violent crime can also be a 1.World problem. Look at America, those guys are crazy ! ;D