If you don't support Capital punishment?

If a member of my family was murdered as you have suggested then I would want to kill he killer myself and if capital punishment was in existence I could lose my own life through the actions of the state. If the culprit was found guilty I would like that person sentenced for the remainder of his/her life and the sentence to be so harsh that there would be every chance that he/she would take their own life. I truly believe sadistic murderers should lose all their human rights.