Not to mention all the innocent people who have been executed over the years, I am sure there have been many, many of them. The people in the prisons and the prosecutors stand behind their actions and say they are only carrying out the will of the people or carrying out the sentence.
This has nothing to do with executions but shows how blind or stupid the legal process can be. 60 minutes on Sunday night had a district attorney who can't see the forest through the trees or is just the village idiot for the town or city who elected him. His contention is that all drug users should be in prison because that is where the laws say they should be. Never mind the growing evidence that is showing if you get these people treatment for their addiction far fewer of them will go back to using drugs than those sent to prison.