These kind of people need to be put down immediately. They do not belong to any societies out there. They only know how to rape, torture, and murder. They cannot be rehabilitated. This 'humanitarian' bullshit about 'preserving human dignity' needs to stop all over the world.
I'd say they should be killed slowly, inflicting as much pain as possible, but I am against animal abuse. Maybe they are less than animals? That would make it okay to kill these pieces of shit slowly.