> I have not seen a case of wrongful execution as bad as this

I have bad news. This is a "typical" death row victim story. There have been several others like him.

http://en.wikipedia.org/wiki/Cameron_Todd_Willingham

http://online.wsj.com/article/SB1000142405270230402380457556...

Over half the death penalty convictions in Illinois were found to be faulty.

http://deadlinethemovie.com/state/IL/index.php

There have been a total 18 innocent people exonerated on Death Row in Illinois. Illinois has executed a total of 12 people since 1976

Prosecutors have no incentive to convict the criminal. Any plausible convict will do.