The guy was convicted of killing a policeman in 1989 but there was no physical evidence linking him to the crime & no murder weapon was found. There were 9 witnesses who said Davis did it, but 7 of them have since recanted claiming police intimidation. They also contend that another man did it, who is, ironically, one of the other 2 witnesses against Davis.
There is something terribly wrong with a system that allows this sort of evidence to go on without action from a justice system. We are supposed to have a justice system & why the system is not working in this case is beyond me.