I say no
Everyone dies, the wages of sin is death, there is not one who does not sin. Only God is good. Only God should play God, and by God, I mean nature/time. Everyone should die of old age. Premature and unnatural death is wrong. Thou shalt not kill, vengeance is mine sayeth the lord. Karma is a natural justice system, unlike the forced human legalistic one. Even torturers and terrorists should not be killed. Life is good! Life is a gift, precious, and temporary. Prison, not death, is a better punishment. The best justice system, however, is repentance, forgiveness, and freedom. Repentance and the resolve to be good, not to commit crime. "Go forth, and sin no more" should be the end of it. Adding punishment to the original crime only adds to the suffering in the world. There is always the possibility of virtue, being/doing good, in the future. All life has meaning and value. Hate the sin, love the sinner. Killing killers isn't justice, it's hypocrisy.
12 hours ago