Dental records show a corpse's identity to be a woman who supposedly died over three years ago from a brain aneurysm.

After a gruesome discovery in a London canal, the investigation leads police to believe they're dealing with a serial killer. He's been careful to cover up his crimes, but forensic experts uncover hidden clues to expose the truth.

A small north Wales community is in fear after the ritualistic murder of an elderly woman. Police are convinced the killer is a local. Forensic evidence mounts, and the net closes in.

Seventeen-year-old Jodie Chesney was stabbed in the back while hanging out with friends in the local park. An obscure clip of CCTV helped to catch her killers.

After a student is found dead in his car, detectives struggle to unravel a sordid, and lethal, family plot surrounding the victim and his girlfriend.

A group of Pakistani men in Glasgow, Scotland, set out for revenge against a Scottish gang by brutally murdering a random white teenager.

A family confront suspected moped thieves with fatal consequences. A close-knit London community demand justice, helping forensic specialists uncover evidence to unmask the knifeman.

A loving mother is brutally attacked in the street during the evening rush hour. The police's prime suspect has a watertight alibi, so it's up to the forensics to uncover the truth.

A university lecturer’s murder, stabbed to death in a park, marks the start of a killer’s reign of terror as more stabbings follow, with authorities scrambling to keep up.

Beginning with a body found in a ditch in 2013, a serial killer investigation takes on a new dimension of importance after two more attempted murders are reported.

After the shocking discovery of a man wrapped in a shower curtain and buried in a deep makeshift grave in the back garden of a Surrey home, forensic experts expose a dark secret.

Reports of a riot-level attack bring authorities to South London, only to learn that one victim, an 18-year-old boy, has already died in hospital.

Police receive a call that 21-year-old student Libby Squire is missing. Humberside Police launch one of their biggest-ever missing persons searches. Then a body is found in an estuary.

A woman is found dead in a playground. When DNA links the murder to a series of sexual assaults in the area, forensic analysis of a water bottle identifies a dangerous predator.

In 2002, an 87-year-old pensioner was killed after a man broke into her home and sexually assaulted her, but police were stumped when none of the DNA evidence came back a match.

After a vulnerable man is found dead in his bedroom, authorities declare a crime scene and begin an investigation before running into difficulties.

After a 65-year-old woman is found murdered just outside her home, a manhunt for the killer runs into repeated problems with evidence and forensics.

After a brutally murdered oil rig worker is found in a burnt-out car, the quiet Scottish town soon becomes inflamed with rumours and fear.

Police respond to what seems to be a hit-and-run leaving three men critically wounded, but while teams begin to gather evidence one dies in hospital.

The story of Scott Wilkinson, who was found murdered in the River Thames while he was on his annual trip on Donkey Island in Surrey.