the this criminal killed someone then why would it be considered wrong to kill him? Does he got the right to kill other people, but no one got the right to kill him? If someone can kill anyone and knows that he/she would not be killed or punished .. what would prevent him/her from committing more crimes and kill more people? This dead person was having life, family, maybe wife and kids ... and that criminal ends all of that ... Don't you think that he/she should be punished?