Not to mention - many of these people have their lawyers claim that they are mentally ill which is, a good amount of the time - pure bullshit. I hate to break it but most of the time, people who are mentally ill do not commit these crimes. You just hear about the few who do it, because it's publicized by the media.
Saying you should execute mentally ill people is really saying you should execute a huge % of the population. Where do you put your limits. Mentally ill consists of depression, anxiety disorders, BPD, OCD, etc, etc. Einstein, Lincoln, John Nash, Beethoven, etc - all mentally ill but perfectly capable of functioning in society.
No way I would agree with that whatsoever... perhaps we should just take DNA samples of all babies born so we can put them in our database so we can simply link a crime to the computer system and catch whoever comitted it.. so much controversy... Reminds me of the case Buck V Bell (Holmes who support sterilizing mentally retarded people with an IQ under 60 or so)...