Quest Red

Discover how toxicologists look for clues in blood and tissue to bring murders to light, including the case of a wife poisoned by cyanide.

Discover how scientists can search beneath water for proof of homicide, with cases including a woman found floating in a pond tied to a car jack.

Follows FBI investigations into similar armed robberies across the US in which several people were killed by two male suspects.

A convicted bank robber and his partner in crime escape on their way to court and go on to make the biggest bank robbery in Wisconsin history.

Shana Grice was murdered after being stalked by her ex-boyfriend, Michael Lane. He denied involvement, but experts examine police videos to determine the truth.

Discover how toxicologists look for clues in blood and tissue to bring murders to light, including the case of a wife poisoned by cyanide.

Discover how scientists can search beneath water for proof of homicide, with cases including a woman found floating in a pond tied to a car jack.

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.

Wisconsin police are shocked to find an elderly couple brutally murdered in their home. When family start receiving death threats, will murder strike again.

A couple is shot in their own home but husband Dan Montecalvo survives. The investigation reveals a scheming killer who almost got away with the perfect murder.

44-year-old masseuse Larissa Macriello vanishes from her Miami apartment, and police discover a dangerous edge to her carefree lifestyle - but what is the real story.

In 1994, a 55-year-old businessman is found shot in his kitchen. The police suspect his disabled son, but would he have had the capability to carry out a murder.

Real estate developer Jana Koklich vanishes and police suspect her job led her into danger, until a local pastor comes forward with a shocking confession.

A maid finds a woman dead in Room 305 of an Oregon hotel. Her grieving husband reveals an open relationship, but was an affair to blame.

A plot to kidnap TV presenter Holly Willoughby is discovered when an undercover cop in the US spots something suspicious in an online chat room.

When investigators suspect a mother's involvement in the death of her two children, Ranger Jim Holland comes in to unearth the truth.

Emile Cilliers attempted to murder his wife, Victoria, by sabotaging her parachute on a 4,000ft skydive. Experts examine Emile's chilling police interview.

A case delving into the exploitative world of baby-farming reveals a terrifying psychopath hiding behind the mask of a caring adoptive mother.

When a mother-of-two disappears, investigators turn to CCTV for clues to help them find her. They make a grisly discovery on a remote ranch in Texas.

The Girl In The Silver Truck. When Laura Pietscher turns up dead in a dumpster in Tampa, detectives turn to CCTV footage to trace her fatal journey and identify her murderer.

How advances in technology can expose a murderous liar, such as the man who staged his wife's suicide to cash in a $100,000 life insurance policy.

Investigating America's 1.8 million missing people; some of whom are runaways who find their way home, whilst others simply disappear.

When police officers respond to a domestic disturbance, a fleeing suspect fires at them. Fingerprints and an FBI investigation lead to the criminal.

When a record store clerk is shot and killed outside a bank, surprising clues left at the scene indicate that robbery was not the motive.

In a rage, Ben Butler killed his young daughter, Ellie, but along with his wife faked a 999 call and protested innocence. Experts analyse their interviews.

Re-examines the 1996 investigation into the abduction of a 17-year-old boy from a shop near his home, followed by ransom demands for $30,000.

New Jersey state trooper Phillip Lamanco is shot dead on duty. Detectives try to find his killers. Is there a link to a terrorist future plot.

The violent activities of gang members from the 'K Street Crew' are investigated by the Safe Streets Task Force.

Pam Jacobs reveals the dark truth about her father. Growing up, she never realised he was a fugitive suspected of the murders of various coin shop owners.

He Almost Got Away With It. Timothy Bass got away with murder for decades, telling his wife, Gina, he was working the night shift. She believed him until she uncovered his secret.

A woman must face the hellish truth about her troublemaking son when he commits a monstrous crime. How much can a mother's love for her son withstand.

He Looks Like The Killer On TV. When a friend tells Margie Bult to turn on the TV, she sees a fugitive named Paul Steven Mack who resembles her husband and vows to uncover the truth.

A man's mother and brother want him to answer questions after he shoots and kills his loving grandmother in cold blood.

When James Bergstrom's wife, Linda, begins to suspect that his bondage fetish is morphing into something sinister, she can't get anyone to believe her.

The disappearance of Denise Williams' husband leaves her devastated. But, when his mother investigates, she discovers the heart-wrenching truth of his demise.

Tony believes his mother found happiness with Deputy Dave Rogers, until he sees the dark truth a man who uses his badge to terrorize and abuse.

Alice Ruggles meets soldier Trimaan Dhillon on Facebook. Experts analyse Dhillon's terrifying behaviour after Alice is found dead.