Here’s one of many, many available stories of someone the US government really, really wanted to murder. He was 17, and ended up on death row.
He was pretty clearly innocent, and it’s hard to imagine the gross extent of the incompetence and misconduct responsible for letting the case go as far as it did. Which is a great place to hang the argument against capital punishment: the system is completely unreliable, as evidenced by the fact that the government were preparing to execute a teenager, despite flimsy details like prosecutors knowingly lying about the evidence and airtight alibis being bizarrely ignored and the clear unreliability of witnesses being suppressed.
So we really can’t be sure innocent people won’t be killed unless we just stop killing everyone. The Innocence Project has counted 330 exonerations of convicted criminals in the last 25 years, through DNA testing, including some who were days away from being put to death. How many others weren’t caught in time?
All that’s still a good argument to make. But this is a reminder, to me as much as to anyone else, that I’d oppose the death penalty even if somehow those objections were utterly resolved.
The problems in any one particular case, with dishonest prosecutors and unreliable witnesses and so forth, are all basically moot. The end result was, you killed someone, or you were going to. I’m not okay with that, and it doesn’t really matter how you got there. No human system of establishing guilt will ever be reliable enough that it deserves to be granted that much trust – but even if it somehow were, let’s still not murder each other over it.