Old Pio, we are Americans. NO ONE EVER HAS TO BE
PROVEN INNOCENT!!!!!!!!!!!!!!!!!
And by my standards of DOUBT (you know, the one that according to a couple hundred years of law is THE standard) quite a few death row inmates, including some who have been executed, had reason for doubt.
That said, it's funny that you can even argue when someone is agreeing with you, like I am.
I brought up that situation only as an example. There is only one kind of person who can definitively say that NO innocent person has ever been executed, and that is someone who has long since closed their eyes and decided to keep them closed.
My mind is made up, don't bother me with the facts.