I asked you to name someone innocent who has been executed, not someone released from death row. It isn't my burden to research and disprove your argument.
The releases don't always prove innocence. It could be there just isn't enough evidence after 15 years to convict and the charges are dropped.
I remember when the really bad Gov. of Illinois left office (poor brain can't remember his name although I'd recognize it), and he left under a shadow IIRC, he pardoned a whole bunch of men on death row, because there were some kinds of legal discrepancies, not because there was any doubt about their guilt.
A lot of times when people who have been sentenced to death for capital crimes are pardoned (from execution, not prison) it's not because they were innocent, but that the wretched legal system had a little string untied or a cop didn't sign something in triplicate.
I know the legal system is ****ed in many many ways. People who are innocent go to jail (I know of two) and people who should have been removed from the planet are walking around causing mayhem.