Mancini was found not guilty but later confessed when he knew he could not be retried. Although his admission was likely an attention seeking ploy, it was also probably the truth.
I believe that Sacco was posthumously pardoned but that is only a forgiveness not a reversal of conviction.
I believe both Tim Evans and Derek Bentley were posthumously pardoned but I think their convictions were still left on the books. In the case of Kelly, it was taken to the "final" stage of actually quashing the conviction.
We had a similar case here when a man named Alan Beaman was released after the Supreme Court threw out his conviction for the murder of his former girlfriend, Jennifer Lockmiller. He had served 14 years for the crime.
Recent DNA tests indicated that there were probably two perpetrators in the Lockmiller crime; neither of whom was Beaman.
Kelly's alleged accomplice, Charles Connolly also had his conviction quashed but he had served a prison term for the killings then was released and died a free man. He'd pleaded guilty to avoid execution but maintained his innocence. The two men both claimed that they did not know each other. Their convictions were mostly based on the testimony of some rather unseemly characters.
Connolly died in 1997.
We had a similar case here when a man named Alan Beaman was released after the Supreme Court threw out his conviction for the murder of his former girlfriend, Jennifer Lockmiller. He had served 14 years for the crime.
Recent DNA tests indicated that there were probably two perpetrators in the Lockmiller crime; neither of whom was Beaman.
In a somewhat unusual circumstance, Jennifer's mother has always said that she thought Beaman was innocent.
Beaman has petitioned the state for a pardon and certification of innocence. They are reluctant to grant him these, however, because it will open them up to be sued by Beaman for monetary damages.