In a recent Held to Answer there is an apparent comparison between Stanley "Tookie" Williams and Troy Davis both executed. But it is an apples and oranges comparison that fails. It is the difference between rehabilitation and reasonable doubt.
There is no doubt about the guilt of the co-founder and leader of the gang Crips. [See Wikipedia.] No retrospective look at his guilt, but there were those that were impressed with his rehabilitation that seemed genuine. But he committed the crimes and should and did pay the price. Justice served.
But Troy Davis can't be compared to Williams except that they both share the same skin color - but there is no racial component in either of these stories. Troy Davis though was a story about reasonable doubt as to his guilt and conviction. Justice not served.