The Dunblane Massacre: In an emotional tribute, witnesses and victims' relatives look back on the murder of 16 children and a teacher at Dunblane Primary School in March 1996.
In the summer of 2007, an innocent 11-year old boy was shot and killed in Liverpool. The crime struck fear into the hearts of every parent in the nation and a massive investigation was launched to bring the killers to justice.
The London Nail Bombings: Police and witnesses reflect on David Copeland's nail bomb terror in 1999. Blasts in Soho, Brixton and Brick Lane killed three and injured over 100.
In 1999, a much-loved BBC TV presenter was shot outside her house. A local man was convicted for her murder two years later, but then acquitted after a retrial in 2008.
Investigation into Jeremy Bamber's murder of his family in Essex in 1985. Sentenced for life, he still maintains he is innocent. Is the right person behind bars? (S2, ep 4)
21-year old Stephen Cameron is stabbed in a road rage incident, and his killer then goes on the run. When he is finally identified he turns out to be Kenny Noye, someone already very well-known to police.
