The death penalty is a crime committed by the society against a single individual, who is helpless. I cannot call it a penalty, it is a crime.
And you can understand why it is committed: it is a revenge. Society is taking revenge because the man did not follow the rules of the society; the society is ready to kill him. But nobody bothers that when somebody murders it shows that man is psychologically sick. Rather than sending him to imprisonment or to be executed, he should be sent into a nursing home where he can be taken care of ― physically, psychologically, spiritually. He is sick. He needs all the compassion of the society; there is no question of penalty, punishment.
From Darkness to Light, chapter 4