Quest Red+1

A woman, Betty, identifies a dead body as her missing sister Annie - but Annie is still alive. A look at murderers who kill to acquire a new identity.

Examines the history and modern evolution of the Texas Rangers, who were formed in the 1830s to protect settlers against attacks from natives.

A masked gunman robs a California bank and escapes after a standoff with police. Months later, when a jeweller is robbed and kidnapped, a tip links the crimes.

When an officer dies in the line of duty, the fraternity of law enforcement bands together to make sure that justice is brought to those responsible.

In Virginia, 2009, student Morgan Harrington vanished. Her body is found, but no culprit is identified until five years later, when another student goes missing.

A look at when there are no eye-witnesses to murder, photographic evidence can provide investigators with a permanent record of the killer.

Investigates partners who commit crimes, including two cab drivers, and a new DNA technique that can extract clues from four-year-old evidence.

Police arrest two conspirators in a plot to kill a woman, but in a dark twist, they accuse the victim's ex-husband of hiring them to kill his ex-wife.

After one of her daughters is murdered, a mother vows to find out the truth. As more evidence is uncovered, she realises the killer may be lurking nearby.

A woman gets involved in the investigation into her sister's murder. Her tenacity and unrelenting quest for justice leads to crucial evidence.

A mother takes matters into her own hands when the police investigation into her daughter's murder stalls. Can she eventually crack the case and catch the killer.

When Charlie Kinkel vanishes in a remote Nevada town, locals shun his wife when she investigates. The discovery of a body reveals a case of misplaced suspicion.

Donna Fontaine and her boyfriend are found shot dead in a burning house. Detectives face a wall of silence until a jilted lover brings evidence to light.

When 42-year-old Trudy Darby is murdered, and two more local women go missing police fear a serial killer. But a surprising call reveals the true culprits.

Armed officers confront a crazed gunman at his home, then discover his terrifying plans to carry out a mass shooting at a school and police station.

When mother Samantha McNorton vanishes without a trace, Ranger Holland steps in and launches a whirlwind investigation, determined to find her.