If you aren't familiar with the Troy Davis case, then you should get a little background on it, but the abbreviated version is that he was arrested for the murder of an off-duty police officer in Savannah, GA in 1989 and has been on death row since 1991.
I wrote a lengthy piece about it for the South Magazine a few years ago, which is how I first learned a lot about the case, and I've followed it closely ever since.
Davis was convicted based on witness testimony and no physical evidence, and in the past few years 7 of the original 9 witness have recanted their testimony, with several saying they were coerced by police.
Due to a GA state precedent Timberlake v. State, the witness recantations aren't considered substantial enough evidence to require a re-trial, and so Davis has sat on death row while countless appeals have gone before courts at every level.
On Sept. 29, the 11th Circuit Court in Savannah will finally hold a hearing on the developments.
Earlier in the summer, CNN aired this segment, which I was incredibly surprised to see had a woman who used to live in Yamacraw Village (public housing not far from where the shooting happened) saying that another person dropped the murder weapon off at her house that night.