I have to wonder, is this type of behavior isolated to the United States? Do other countries have these same types of offenders running around and they aren't caught, or are there better ways of dealing with them? Maybe you just don't hear about what happens to this type of offender in other countries? I can't image any culture tolerating this type of person.
Personally, this is a no brainer and the convict needs to be killed, which I am sure is not a world view. Killing the offender may not be the most 'civilized' approach, but it is 100% effective in preventing a repeat offense along with making more jail space available. Castration would work as well, but that seems even less civilized than a death penalth.
Regards,
Malta