Two rookies experience a different side of policing in Alaska. Sgt Peyton and his officers take to the roads for high speed chases in treacherous conditions.

Colorado Springs police detective Joseph Kenda investigates another brutal murder.

Witnesses and terrorism experts revisit May 2013, when soldier Lee Rigby was murdered by two religious extremists near his barracks in Woolwich.

As the last two participants embed in the facility, reality sets in for the special ops team, and Tony gets right back to work.

In 2011, a US congresswoman was shot and six people were killed outside a grocery shop in Arizona by a deranged lone gunman.

A psychological look into some of the real-life murder cases that have made headlines around the world.

Melissa Mooney was thrilled to move into her new house, but when her FBI co-workers find her strangled in her bed on moving day, they launch a personal manhunt to catch her killer.

When mother-to-be Rhoni Reuter is shot in her Chicago condo, all attention is directed at the baby’s father, Shaun Gayle. But it's soon discovered that Shaun has many more girlfriends than just Rhoni, and more than one of them has an issue with that.

Houston, Texas, is rocked by a grisly crime scene - a man whose head is practically hammered off his body and a semi-nude woman riddled with pickaxe wounds.

When a beloved grandfather goes missing in rural Utah, a simple missing persons case becomes a complex crime of kidnapping and a shocking murder.

After defrauding his clients of more than $40 million, it's no surprise to police when Andrew Kissel is found tied up and stabbed in his rented mansion. With so many people wanting him punished, who was angry enough to make it a personal vendetta?

Documentary series exposing murderers who have brazenly shown their faces on TV and in the media while secretly knowing they had blood on their hands.

When the body of a beautiful Texas school girl is discovered, rumours buzz around the high school that a killer is walking the halls.

Detectives in a small Australian town attempt to track down a sadistic killer when residents start finding bodies of dead women in rural locations.

When Hollywood cameraman Robert Samuels is brutally gunned down in his own home, somebody wants to make it look like a burglary. But police slowly uncover a dark conspiracy based in greed and betrayal - a story right out of the movies.

Art student Shelley Nance is found dead in her bed with multiple stab wounds and it looks like her ninja boyfriend is the killer. But it turns out more than one person might have wanted this young co-ed dead.

A drug-fuelled killing spree terrorises a small California town. Police believe they are dealing with a serial killer who lives quietly among them.

Detectives get to work on a shocking case when a mass grave of women is discovered just outside of Johannesburg, South Africa.

When Sue Snow takes some pills and dies from cyanide poisoning, police think they may have another random 'Chicago Tylenol Poisoning' on their hands. But when a second victim appears, it starts to look like someone has a very personal motive.

When Rozanne Gailunas opens her door for a delivery and is shot in the head, police focus on her estranged husband and secret lover. But then someone walks into the police station claiming that they married the hitman who was hired to kill Rozanne.

A homeless man finds dismembered body parts in a North London skip. Police soon find more and realise they have a killer in the neighbourhood.

Los Angeles police attempt to track down a vicious serial killer when bodies of women start turning up in the garbage.

After a night of partying, law student Jesse Valencia is found with his throat slashed. He was a free spirit in the college gay party circuit, so there is no shortage of suspects.

Documentary series exposing murderers who have brazenly shown their faces on TV and in the media while secretly knowing they had blood on their hands.

No one would suspect that the perfectly manicured lawns with trimmed hedges and fences lined up like toy soldiers would harbour such secrets, but sometimes things are not always what they seem.

A terrified mother wakes to discover that her eight-year-old daughter has disappeared from her bedroom in the middle of the night.

A teenage mother takes desperate measures when the father of her two children comes back into their lives and is granted custody.

Let’s face it, high school can be tough. In 2009, some Florida high school students find out just how hard it can be when someone winds up dead. Talk about taking a class in Murder 101...