From this day forward, i no longer shall tinker with the machinery of death. the death penalty experiment has failed was written by:

The quotation "From this day forward, I no longer shall tinker with the machinery of death. the death penalty experiment has failed." was coined by Justice Blackmun which is one of the senior members of the court at that time, and the quotation was from his highly emotional dissent.

Idon’t know who knows i do know who does not know me