The case of `jigsaw killer' Stephen Marshall, who murdered businessman Jeffrey Howe in March 2009 and scattered his body parts in locations around Hertfordshire and Leicestershire. Featuring interviews with police officers involved, the programme reveals how the grisly case was solved, with Marshall sentenced to life imprisonment in February 2010 and his girlfriend Sarah Bush jailed for three years and nine months for perverting the course of justice.

The case of Hells Angel Gerry Tobin, who was murdered by members of rival motorcycle gang the Outlaws on the M40 while travelling back from the Bulldog Bash festival in August 2007. With access to the police investigation and CCTV footage, as well as interviews with Tobin's family, the programme pieces together the events that led up to his death.

July 2010. Armed with a sawn-off shotgun, the former bouncer began his campaign of terror after being released from prison, murdering Chris Brown - his ex-girlfriend Samantha Stobbart's partner - and shooting policeman David Rathband, which left the officer blind. Following a manhunt that lasted almost a week, Moat was found in Rothbury, Northumberland, where he eventually took his own life after a stand-off with police.