In this Sept. 21, 2011 file photo, a man chants during a vigil for Georgia death row inmate Troy Davis In Jackson, Ga. Davis insisted for years, up until his final words in Georgia's death chamber, ... more 
In this Sept. 21, 2011 file photo, a man chants during a vigil for Georgia death row inmate Troy Davis In Jackson, Ga. Davis insisted for years, up until his final words in Georgia's death chamber, that he was wrongly convicted of killing a police officer based on faulty testimony from witnesses to the crime. It wasn't enough to sway courts to spare Davis, who was executed last week, but his supporters say the case adds heat to an already simmering debate over what role eyewitness testimony should play in death penalty cases, or any criminal trial at all. (AP Photo/John Bazemore, File) less 
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Associated Press | Photo By John Bazemore, File
Tue, Sep 27, 2011 9:55 AM EDT