Every month Crimewatch reconstructs a case that has been solved and shows exactly how the police and often the public worked to track down the culprit. Here are the cases we've covered so far.
David Chenery-Wickens - March show 2009
Sentenced: March 2009
How Sussex Police finally tracked down David Chenery-Wickens, who was convicted of the murder of his wife Diane, a year after he first reported her missing.
Read the full story and watch the Crimewatch reconstruction.
The love triangle killer - February show 2009
Sentenced: 1996
How Hampshire Police tracked down the killer of Harjit Singh-Luther despite having nothing to go on apart from a crushed skull.
Read the full story and watch the Crimewatch reconstruction.
The Manchester triple murderer - January show 2009
Sentenced: March 2008
How Greater Manchester Police were locked in a race against time to find enough evidence to charge a triple murderer before he walked free.
Read the full story and watch the Crimewatch reconstruction.
The milkman note killer - December show 2008
Sentenced: December 2000
How a note for the milkman led Sussex Police to David Munley, a psychopath who killed an elderly lady and then fooled the outside world into thinking she was still alive.
Read the full story and watch the Crimewatch reconstruction.
The Panama Drug Smuggler - November show 2008
Sentenced: February 2007
How the Met's Specialist Crime Directorate and the Forensic Science Service thwarted an attempt to smuggle cocaine into the UK in a way never seen before.
Read the full story and watch the Crimewatch reconstruction.
The Pasta Poisoner - October show 2008
Sentenced: May 2008
How a hair sample helped North Yorkshire Police convict Heather Mook who poisioned her husband by putting pills in his favourite pasta dish.
Read the full story and watch the Crimewatch reconstruction.
The Parent Killer - September show 2008
Sentenced: November 1994
How soil samples and forensic anaysis led Leicestershire Police to Eileen and Derek Severs' bodies and enabled them to arrest their son Roger for their murder.
Read the full story and watch the Crimewatch reconstruction.
The Leeds Strangler - June 24 show 2008
Sentenced: July 2002
How tenacious policing enabled West Yorkshire Police to track down the killer of 16-year-old schoolgirl Leanne Tiernan.
Read the full story and watch the Crimewatch reconstruction.
The Tesco Bomber - June 2 show 2008
Sentenced: June 2001
How a fire in a local postbox led Dorset Police to track down the Tesco extortionist Robert Dyer.
Read the full story and watch the Crimewatch reconstruction.
The Haslemere paedophile - April show 2008
Sentenced: March 2008
How one man's decision to become a police officer enabled Surrey Police to convict the paedophile James Evans.
Read the full story and watch the Crimewatch reconstruction.
Fred Lawlor - March show 2008
Sentenced: October 2007
How a rusty old car tyre enabled North Wales Police to convict Fred Lawlor of the murder of his partner Dorothy Carre.
Read the full story and watch the Crimewatch reconstruction.
Rotherham Rapist - February show 2008
Sentenced: September 2006
How familial DNA helped the South Yorkshire Police finally track down the Rotherham shoe rapist.
Read the full story and watch the Crimewatch reconstruction.
Clapham Killer - January show 2008
Sentenced: 17 February 2006
How the Metropolitan Police investigation led to the conviction of Gary Nelson for a double murder in Clapham.
Read the full story and watch the Crimewatch reconstruction.