BBC documentary on Nottingham knife rampage killer Valdo Calocane is branded 'shameful' by grieving families of victims who say Panorama show made their trauma 'a million times worse'

Valdo Calocane, 32, went on a rampage in the city in June last year killing 19-year-old student's Grace O'Malley-Kumar and Barnaby Webber before fatally stabbing Ian Coates, 65.