For years, Mahmood Mattan's family believed in his innocence. But no-one would listen. Then in 1969, a shocking revelation - another vicious attack which bore many of the hallmarks of the murder of Lily Volpert. And the man responsible for that attack was also a vital witness in the case against Mattan. Finally, could the family prove once and for all that Mattan was an innocent man who should never have been sent to the gallows?

Presenter and Producer: Danielle Fahiya Sound Design: Cathy Robinson Original Music: Rhodri Llewellyn John Executive Producers: Karen Voisey and Andy Maguire Story Consultant: John Norton Production Manager: Andrea Deere

History Consultant: Chris Phillips. Archive: BBC Black Britain; ITV Wales

James Callaghan, Edmund Davies & Melbourne Thomas - Richard Elfyn Tom Driberg & Rhys Roberts - Rhys Downing Harold Cover - Anthony Corria Margaret Bush - Zoe Davies David Wickham - Dean Rehman