In December 2000, Barri White was accused of murdering his girlfriend and sentenced to life in prison. But hope comes when an investigative journalist gets involved in the case. Can he prove Barri's innocence and overturn the convictions?

An investigative reporter and a team of leading forensic experts set out to prove that the convictions against Barri White are wrong. In proving his innocence, however, the question of who the real killer is looms over the case.

In December 2010, Joanna Yeates was found dead near her home resulting in the arrest of her landlord, Christopher Jefferies. His eccentric appearance and mannerisms made him a prime suspect and he found himself condemned by the national media.

Despite his release, Jefferies was the subject of continued speculation and hounding by the police and the press for another two months. It was only once detectives identified the real killer, that Jefferies was able to restore his reputation.

In March 1950, Timothy Evans was hanged for murdering his wife and daughter. A star witness in the trial was John Christie, who would later be revealed as Britain's worst serial killer. Timothy's sister breaks her silence to recall the tragic events.

Even after Evans' death, the local death toll of women was increasing, leading police to investigate further. Justice would eventually catch up with John Christie. Yet, to this day Timothy Evans' conviction has never been overturned.

In 1992, Rachel Nickel was murdered while out walking with her young son. After the biggest police manhunt in modern history, Colin Stagg was imprisoned for her murder. All the while, the real killer was free to kill and kill again.

In October 1975, 11-year-old Lesley Molseed went missing while walking to town. Within days a local man called Stefan Kiszko was arrested and charged with her murder. With few fighting for his innocence, Stefan would spend 16 years in prison.

Forensic evidence proved that Kiszko could never have committed the murder and that he had been convicted as part of a flawed police investigation. It would be 32 years after Lesley's murder that the real killer, Ronald Castree, would be convicted.