From the beginning, it has always been man judging another man or woman. You can go back and history and see how people judged another without due cause. The so-called witches were burned at the stake while others sat around and watched. A person could be strung up and hung from a tree by just one or two men. If another man or woman did harm to one's family, the first thing that came into the minds of this family was to find this person and make them pay. WWII was the worst example in history where millions of Jews were killed just because of their religion. Furthermore, you need to take a look at what happened in Texas when a cult leader decided it was time everyone killed themselves. Yes, people followed, but who was he to say it was their time to die.
Do we really have the right to do this? I don't think so. We are not the judge, jury and can execute a person because we see fit. There have always been laws set in place to take care of this. But many people want to go outside the law and handle these types of events on their own.
In reality, there is no human way to kill a person that doesn't inflict pain and suffering on this person. When a person is executed in prison the ways are still inhuman. How can only 12 people in a jury decide this is what should happen. I understand this person might deserve to die, but he should die with dignity and not made to suffer. I was happy when the death penalty was abolished, but now some states have brought it back. If a person commits a crime and is sent to jail, this person should be made to atone for his crime by rehabilitation, hard work, and to spend the rest of his life behind bars. I can see that he might get an early release if he has spent over 50+ years in jail. But by this time they adapt to their surroundings and this is their home now. They really don't want to be released because they have no idea how to live on the outside. So leave them there and let them die a natural death.