What I think is I would like to know more information. How many of these prisoners continue to be a threat and continue to harm and kill other inmates and guard

What I think is I would like to know more information. How many of these prisoners continue to be a threat and continue to harm and kill other inmates and guards. And if it's average is lower than the US, I'd love to find out what methods they use to prevent that. I don't think they're necessarily wrong for not executing them, but to say theres never a case where that's the best option for society and prisoners seems more ideological than realistic. I'm not saying we won't some day have some better way of correcting such folks (maybe something like CRISPR comes along and allows us to modify their predispositions; but that opens up an entirely new can of ethical worms), but there is a valid question to ask: how much freedom and how much suffering do you allow a man to cause before you realize that he's only going to do more harm? And how do you balance that out without possibly torturing him? I don't think we will ever find the perfect solution, but I do think we should be constantly looking, and I think metrics to measure the effectiveness of policies should help guide us.