Their main emphasis is about deterrence. Does capital punishment really deter crime? To me that's bullsh1t. The main reason for giving death to the criminals should be  about justice and fairness for the victim's family and  for the victim itself. If a crime is so savage then the fuvking criminal should get savage punishment as what they did in Yemen. I guarandamntee the perpetrator will think twice before he will take a chance because you ain't gona wait 2 decades to get executed by pathetically painless lethal injection my ass.  By the way, I don't believe in torture.