For me, there is. I wouldn't necessarily impose this belief on others, but I can't really believe that any person should just be executed. I know many do not share the belief, but I think that murderers (and the like) are created not born. That is, it seems to be a feature/bug of our modern culture that a good deal of those-beyond-all-hope occur with regularity. To the extent you take mercy on such individuals, it is chiefly important to protect the public above all else. Beyond that, why not seek to understand how the criminal became what he was, and if as a by product, that person gains something like rehabilitation, so be it.