Documentary series telling the stories of some of the UK's most high-profile murder cases.

Maureen Cosgrove was a pillar of her community in Carshalton, south London, but when unemployed drifter George Maben fell in love with her youngest daughter and moved in, the 65-year-old had unwittingly invited her murderer into her home. This programme charts the events leading up to her death in 2009 and includes interviews with Maureen's son John, friends of the family and DCI John McFarlane from the Metropolitan Police, as well as featuring contributions by forensic psychologists.