I still believe a good strong stiff rope with sufficient height to drop the body and additional weight is good enough or say, five men, or women, each with a .308 caliber or 5.56 NATO round, two of them blanks and three of them live rounds aimed squarely at around mark located over the man's, or woman's heart. These are not nice people and guilty of crimes that had no grace or compassion in them. While I'm sure there are some few individuals that get as far as the execution chamber who are actually innocent I cannot believe that is many and hopefully if there is enough doubt that the individual may have committed the act then potentially final sentence can be postponed until such proof is found.