Robin Garbutt, who is serving a life sentence for murdering his wife, claims that the faulty Horizon IT system used in the Post Office scandal was also used to frame him.
Garbutt says the evidence relied upon during his trial is faulty and that a man wearing a balaclava and holding a gun forced him to hand over £16,000, after which he found his wife dead.
The prosecution argued during the trial that Garbutt may have staged the robbery to cover up losses reported on the Horizon accounting system.