coles was the killer. we tried to find sylvester "red" coles. talked to family members but couldn't track him down. >> i don't believe red coles killed mark at all. >> reporter: the officer's wife looks at sylvester coles in a very different light. >> sylvester came forward. he didn't have to. troy ran and he didn't have to. if he were innocent he should have come forward. >> reporter: what does she think about people like tanya johnson, with her new information? >> five minutes of fame. >> reporter: pope benedict has asked for davis' sentence to be commuted. jimmy carter and death penalty supporter bob barr have asked for the case to be reopened. troy davis has been hours a way from execution three times only to have the case reviewed. i spoke to troy davis and asked him if he thought he would be executed he said no. he told me he has faith in the justice system, a view that is ironically shared by the wife of the murdered police officer. >> we have to believe in this justice system. >> reporter: she is waiting for a much different outcome. gar

sylvester coles asked you to hold his gun? > yeah. >> reporter: sylvester coals, the man who admitted harassing the homeless person, who admitting to fingering troy davis. >> he opened the screen door. >> reporter: this screen door here? >> this screen door which this was not here. it was a wooden screen door. this was tore out. he opened the door, set the gun here and shut the door back. >> reporter: and you -- did you think he did the shooting? >> yes, sir. >> reporter: did you ask him? >> no. the way he was acting -- >> reporter: how come? >> i was scared. >> reporter: you were scared to ask him? >> yes. i was scared of him. i'm still scared of him. >> reporter: today you're scared of him? is he still in town? >> yes, sir. >> reporter: a free man? >> yes, sir. >> reporter: you are scared of him. >> yes, sir. >> reporter: how come you are talking to me, i admire you are. >> i don't want to see this innocent man get killed for something he didn't do. >> reporter: during the trial davis' attorneys try to convince jurors cole wa