Here is a quick summary of the main issues: (1) There is no reliable evidence that Williams is guilty of the crime; (2) The DNA evidence from the crime scene does not match Williams; (3) Numerous legal experts, including St. Louis County Prosecuting Attorney Wesley Bell, argued convincingly that Williams' death sentence should have been commuted to life in prison, at a minimum; (4) A Republican governor ignored the facts and legal opinions and simply murdered Williams.
I agree. You were still wrong in ways that do matter. Acknowledging it gracefully makes your case stronger, not weaker.
In a number of cases, the Innocence Project has certainly managed to find hard DNA evidence that linked the actual murderer to the crime, resulting in saving people from death row. One of my friends worked on some of these cases. As former law enforcement, he was very much aware of the various ways the system can fail. Police officers commit perjury on the stand, "expert" witnesses use pseudoscience with zero factual evidence (there are processes to prevent this which have gotten slightly better), and there are shockingly terrible public defenders.
It would appear the jury disagreed with you. Cue the liberal bitching about how American justice is broke, blah blah blah, blah blah blah blah blah blah blah blah. Same shit, different day, different website.