The chilling story of an Oklahoma estate agent who cheated on her husband before putting a bullet in his head as he watched TV.

For homicide detectives, the clock starts ticking the moment they are called. Their chance of solving a case is cut in half if they don't get a lead in the first 48 hours.

Reality series following US detectives as they reconstruct murder victims' catastrophic final hours to help catch their killers.

TBC.

When firefighters respond to a raging house fire, they discover the blaze was just a cover up for a vicious murder.

In New Orleans, a young mother is found shot and burned in the trunk of her car when a night out on the town becomes her last.

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

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.

A 25-year-old aspiring model vanishes and the only clue police have is her empty car found in a nearby cemetery car park.

When a former Marine is gunned down trying to recover his stolen bicycle, Tulsa detective Matt Frazier goes on the hunt for an elusive criminal family.

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

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

A young mother's mysterious disappearance is the start of one of Memphis's most notorious criminal investigations.

In New Orleans, a double-shooting on Bourbon Street has the city on edge. And in Tulsa, a man killed by a shotgun blast may have been lured into a trap.

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.

Nineteen-year-old Elizabeth Marriott goes missing and the investigation leads to a woman who claims that Marriott died during rough sex.

A 15-year-old girl vanishes in the middle of the night. Would a friend's terrifying secret be the key to solving the mystery?

When a young mother is found naked and strangled in her car, Tulsa Detective John Brown uncovers a dark obsession that may have turned deadly.

When a sniper randomly guns down students and pedestrians from atop the University of Texas clock tower, police have no plan in place for such an event. There’s pandemonium until two cops and a civilian join forces.

When a killer bursts into a Honolulu conference room he leaves behind seven dead in the biggest mass slaying in Hawaiian history.

A blood-stained dollar bill is the first clue in a terrifying murder investigation. Paula Zahn unravels the tragic case.

In medicine, they call it the 'critical hour', while in criminal investigations, they call it The First 48.

When the body of 41-year-old Marsha Spicer is discovered in Missouri, police discover her links to an ex-con who had a fantasy to make a snuff film.

California police investigate the 2010 murder of Julie Kibuishi and the mysterious disappearance of her friend Samuel Herr.

When a sniper randomly guns down students and pedestrians from atop the University of Texas clock tower, police have no plan in place for such an event. There’s pandemonium until two cops and a civilian join forces.

When a killer bursts into a Honolulu conference room he leaves behind seven dead in the biggest mass slaying in Hawaiian history.

When the body of 41-year-old Marsha Spicer is discovered in Missouri, police discover her links to an ex-con who had a fantasy to make a snuff film.

California police investigate the 2010 murder of Julie Kibuishi and the mysterious disappearance of her friend Samuel Herr.