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 FahiyaSound Design: Cathy RobinsonOriginal Music: Rhodri Llewellyn JohnExecutive Producers: Karen Voisey and Andy MaguireStory Consultant: John NortonProduction Manager: Andrea Deere

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

James Callaghan, Edmund Davies & Melbourne Thomas - Richard ElfynTom Driberg & Rhys Roberts - Rhys DowningHarold Cover - Anthony CorriaMargaret Bush - Zoe DaviesDavid Wickham - Dean Rehman