The parents of a murdered South Norwood woman will appear on a new ITV documentary tonight talking about revolutionary techniques that led to her killer's conviction.Children's photographer Lorraine Benson, 22, was brutally strangled by John Dunne in 1988.Her distraught parents Michael and Lyn, of Woodside Park, watched as Dunne denied the allegations that he killed Lorraine, who worked at Children's World in Waddon.However, key DNA evidence on his handkerchief pinned down that there was only a...
