A fibre analyst helps convict the killer of grandmother Maureen Cosgrove, and how forensic evidence was used in the case of serial child killer Robert Black 40 years ago. Show more
Discover 11,128,835 listings and 278,152 playable programmes from the BBC
A fibre analyst helps convict the killer of grandmother Maureen Cosgrove, and how forensic evidence was used in the case of serial child killer Robert Black 40 years ago. Show more