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Investigates murder cases that took a decade or more to solve and how detectives can solve such cases when clues have become scarce.

Find out how arson investigators can retrieve important clues from scorched rubble, leading to the arsonist.

In 1990, Chicago experienced a string of bank robberies. As the 'Bearded Bandit' became more sophisticated the FBI surmised that it could be a cop.

Greed was the main motivation for the Prince Brothers' killings, firstly for money, then to get rid of those they believed could incriminate them.

When two young girls are murdered three years apart, the police believe the same man is responsible. Can they catch him before he strikes again.

Aspiring architect Claudette Ficik charms everyone she meets with her warm personality, but one cold February day she disappears in broad daylight.

A waitress is attacked as she returns home from work, late at night. Will a chilling clue found at the crime scene ultimately lead to justice.

The Man In The Cowboy Hat. In 2016, a motel cleaner finds the body of an unidentified woman in one of the rooms. Detectives use CCTV to track a mysterious suspect in a cowboy hat.

When firefighter Bob Poynter is killed, no-one appears more devastated than his young wife, Chacey. But soon detectives discover a web of lies.

A Mississippi husband who uses a wheelchair turns violent when his loving wife tries to end their marriage. Was it self-defence - or murder.

Drip, Drip! Nurse and private investigator Nikki and Jimmy Cappello are a dynamic duo - until Jimmy suddenly goes missing.

Frank Buschauer is convicted of drowning his wife, Cynthia Hrisco, in a whirlpool bathtub. His family maintain the death was a terrible accident.

Judge Rinder explores the story of a woman who was set on fire and a series of thefts of laughing gas canisters from hospitals.

When an innocent woman in a quiet town is shot in broad daylight, detectives act to find her killer. Can video surveillance reveal what happened.

The 1990 murder of Dianne Hood uncovers two broken marriages, an extramarital affair and one man trying to control two women.

A sadistic murderer terrorises Dallas in 1991 as a series of women are found murdered with their eyeballs surgically removed.

When a loving couple fail to reach their holiday campsite, New Mexico State Police investigate. With no forensic evidence or witnesses, they scour CCTV footage for clues.

Dismembered human remains are found in a grocery bag on a riverbank - will detectives be able to piece together the victim's identity and catch a killer.

A makeshift coffin conceals a body - can insects help cops identify the corpse? Plus, a parasite expert proves murder when a woman is found in a dumpster.

When Diane Cunningham is found murdered, the only clues are several receipts. Security footage reveals a prime suspect, but not everything is quite as it seems.

Family man Richard Arenas is gunned down in broad daylight. With no apparent motive or witnesses, can investigators track down his killer on CCTV.

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.

Experts analyse a man's deception following the Manchester Arena terror attack. Police tapes expose a man who murdered his wife and hid her body in the freezer.

When homicide investigators meet crime writers, it transpires that real-life stories are often stranger than fiction.

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

Emily Lambert goes missing after spending the night at a hotel bar. Two days later, she is found murdered. Can investigators track down her killer on CCTV.

When Hope Melton vanishes after being run off a road, CCTV footage from a nearby gas station reveals a suspicious car. Can police find Hope before it's too late.

Police rely on a drop of blood to determine a missing person's fate. Plus, when a woman is hit by a train, is a killer covering his tracks.

How baffling crimes have been solved through evidence provided by insects, beer bottles and other seemingly meaningless objects.

Following the FBI investigators, special agents and detectives as they solve some of the toughest cases.

In Beirut armed extremists seize a plane and terrorise everyone on board. The CIA undertakes a daring operation to stop the hijackers; but will they succeed.

In Texas, a patrol car policeman is obsessed with being a 'Superman Cop.' But when Susan Harrison spurns his advances, he goes rogue - and she ends up dead.

Re-examines the investigation into a US bank heist of 1997, in which two armed men opened fire on staff and police officers at close range without mercy.

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.

A waitress is attacked as she returns home from work, late at night. Will a chilling clue found at the crime scene ultimately lead to justice.

Police discover that the successful wife of a popular DJ has been murdered. Will video cameras in the neighbourhood help bring her killer to justice.

Did a woman's crusade to teach children to read lead to her murder? The police's only hope is to follow the clues left behind by the victim.

Police must solve the murder of a young woman killed while celebrating her graduation from U.S. Naval training.

Police struggle to dissect the love triangle that led to the murder of a woman. Was her jilted husband responsible, or her jealous new boyfriend.

In East Windsor, New Jersey, police attempt to solve the kidnapping of a 19-year-old who was taken out of her bed in the middle of the night.

On a stormy night in Memphis, Micah Rine Pate mysteriously disappears, leaving behind unanswered questions and a husband whose story just doesn't add up.

A father discovers his son committed three murders and makes the agonising choice to turn him in, a decision that destroys their relationship forever.