alan chappelow was bludgeoned to death in his home in 2006.s killing, a chinese dissident who was somehow connected to the secret intelligence service mi6. the case has always been shrouded in mystery as the first murder trial in modern times to be held partly in secret. the court of appeal is due to decide whether the guilty verdict should be overturned. we've spoken exclusively to the man behind bars, who always claimed he suffered a miscarriage ofjustice. i'm thomas harding. i grew up here on downshire hill in hampstead, north london. i knew the victim alan chappelow as the eccentric who lived four doors up the road from me. after he was killed, the house was knocked down and redeveloped. it's recently been on the market for over £14 million. i've spent the past year writing a book about this story. i want to get to the bottom of what happened to my neighbour. an author and photographer, who wrote about george bernard shaw, alan wasn't close to many people. peter tausig lived two doors down the street from him. alan chappelow was part of do