Viewers help police solve serious crime. Tonight police appeal for information on the murder of Lorraine Benson, a young photographer from south London who was killed on her way home from a Christmas party. People remember seeing her as she left Raynes Park station but where did she go from there? And an armed raid in Northampton city centre which began in rural Norfolk. A distinctive motorbike used in the high speed get-away might be the key to the robbery. Did you see it?