Truly it isn't the murderer's fault. I don't believe in moral responsibility. However steps should be taken to make the environment inhospitable for murderers. This is why I believe in the death penalty. Not to punish the murderer, but to make others thinking about murderering someone at least think twice. Of course if we had an effective way of rehabilitating the murderer even better, but at the moment the judicial system is not set up not for rehabilitation but punishment and holding.