Are Some Punishments too final?

             In "The Crucible" by Arthur Miller, Governor Danforth calls witchcraft an "invisible crime," in which Salem must rely on witnesses to present the evidence. However, this literally places the accused's life in the hands of the witness, who we can guess is not too fond of the accused. I don't understand how we can place the life of a human being in the hands of other humans who can be so cruel and mean. Fore example, Abigail blames Tituba and calls her witch without hesitation in order to save her own skin while Putnam causes Rebecca Nurse to be hanged simply for more land. The Death Penalty is final. If you lock someone in jail, you can set them free but you can't bring the dead back to life. I understand that now we have supposedly impartial juries but how are we to know that they are making the right decision? In Controversial cases like the Casey Anthony trial and the trial of George Zimmerman, we are still not in agreement as to what the correct decision was. Before someone is condemned to die, we must be sure that are completely guilty, but we can never be sure. How terrible would it be to die like John Proctor, a man who was seen as totally guilty yet was completely innocent.  The Death Penalty is too much power for humans to wield. We are not gods to say who lives or dies.