Season 4

Documenting the landmark case of Stephen Lawrence, who died at the hands of a racist gang on 22 April 1993 while waiting for a bus in Eltham, south-east London.

In the summer of 1993, gay men in London was being terrorised by a brutal killer. Colin Ireland, a loner from Southend in Essex, had made a macabre resolution - to become a serial killer.

Failed businessman Christopher Foster killed his wife and daughter before burning their mansion in Shropshire to the ground in August 2008.

Arguably Britain's most infamous serial killer, Peter Sutcliffe became known as The Yorkshire Ripper when he began murdering women in Yorkshire during the 1970's.

Garry Newlove, a married father of three, was beaten to death outside his home in Warrington, Cheshire in August 2007.

In the summer of 2010, the nation watched as police mounted one of the largest manhunts in British history. Raoul Moat went on the run after he shot and wounded his ex-girlfriend and killed her new partner in Newcastle.