Based on the article, the man doesn't sound like a psychopath. Seems to lack the superficial charm of one and have genuine fondness for his wife.

I looked into CCRC mentioned here and seems like they only refer cases where new evidence has been found. Rejecting old evidence does not qualify. The committee has also been severely hit by austerity measures in recent years.

Couldn't say whether he's guilty or not, but based on the coverage here and the incompetence of the police investigation, the man clearly deserves a retrial.

Sounds like there's absolutely enough room for doubt that he shouldn't have been convicted, though.