I would like to point out that a conviction being overturned is no proof of innocence. Just look at the case of David Cullen Bain in New Zealand. The weight of evidence in court trails and in the court of public opinion is very different and unless you have reviewed all the evidence and testimony then it is impossible to say.
The Bain family murders are a cautionary tale about what happens when justice crusaders who believe they know better than the judicial system based in newspaper reports and gut feelings get involved in murder cases.
David Cullen Bain murdered his parents and three siblings and walked free because of some misguided crusade against the police. An over turn conviction just means that evidence was initially mismanaged, not that someone is innocent.
People banging the drum about a retrial might want to remember that. Getting someone off on a technicality is not a victory.