The problem with the DP is innocent people getting executed. At least two in Texas: Cameron Willingham and Ruben Cantu. Hundreds if not thousands before the Furman vs Georgia case in the 1970’s when the Supreme Court temporarily abolished the DP so that the things leading to innocents getting executed could be fixed.
Problem is we live in an imperfect world where mistakes are made. A 18 year old girl in my state was murdered back in 1996 and a guy arrested and convicted the next year. People were calling for his head and would have hung him on the spot back then if they could have. Doubts started creeping into the case when the DNA left behind in didn’t match the guy but it still took 20 years for him to get released. Now just a few weeks ago police finally matched the DNA to someone thanks to sifting DNA through a genealogy site which led them to a grandparent of the person who left the DNA behind and then finally the real killer who confessed. The first guy though still lost 20 years of his life and still has a murder conviction on his record though that hopefully will get expunged in the coming months.
Its actually a fascinating case that will undoubtedly become a movie someday. The mother of the victim is the one who first came to the conclusion that the guy in prison was innocent and had been exhausted into a false confession by cops after days of grueling interrogation. She became his champion to get his conviction overturned and hugged him in the courthouse the day he went free. Her determination is what got the states innocence project involved and helped expose the flaws in the case which ultimately led to a deal where he would be released after 20 years but the murder conviction would stay. At the same time the original cops who majorly screwed up in their zeal to arrest anyone had retired and new younger cops, many of whom were just small children when this originally happened, were willing to look at the case again with an open mind which led them to trying things not available 20 years ago like using genealogy sites to try and find a DNA match. Now the real killer is in jail awaiting trial.
Point is I lived in the city where this happened back when the murder and conviction happened. I remember well people calling for the death penalty in this case and the anger many had when he didn’t get it. And he was innocent all along.