As the case unfolds, critical investigative mistakes are made - but potential suspects are introduced, including a Santa impersonator and a known sex offender.

In 2006, a local academic writing a book on JonBenét gets a series of messages from a man called 'Daxis', who has a dark obsession with the case - but why?

Single mother Brooklin meets a gorgeous guy online. Despite many red flags, she marries him and is soon alienated from family and close to financial ruin.

In 1993, 16-year-old Daniel Villegas confessed to murder. But, was he was forced to confess to a shooting he knew nothing about?

West Memphis is shocked when three young boys are found dead in a ditch. Fearing the work of satanists, police arrest three teenage boys without solid evidence.

When an 11-year-old Arizona girl vanishes while waiting for an ice cream truck, the search for her is the largest missing child investigation in Arizona history.

Residents of Aurora are horrified when a beloved mother and hairstylist is found dead. In a case where everyone liked the victim, anyone could be the killer.

Elizabeth Baune was a pillar of her community until she was stabbed to death. Everyone is shocked to discover that her own kindness may have been behind her death.

When grad student Jarrod is shot dead in the resort community of Santa Barbara, detectives are mystified. But was there a dark side to this easy going guy?

Chae is beaten to death at home. Is this attack one in a series of assaults against Asian-American businessmen, or does his assailant lurk closer to home?

When the well-liked South Bend native, Tim Moore, seemingly vanishes one cold November night, residents begin to doubt the folks next door.

When local bootlegger Billy Triplett and his wife turn up dead, locals suspect it must have had something to do with his illegal side-business.

A single mother is found dead at home by her best friend. Detectives then embark on a wild chase involving dangerous and surprising characters.

An interior designer loves meeting people on the internet. When he's found dead, police believe one of the online strangers might be the person who killed him.

Retiree Alex Strategos is consumed by loneliness. He turns to internet dating and finds 69-year-old Melissa, but is soon struck by a rush of unexplained illnesses.

When Nikki McPhatter doesn't show up for her usual work shift, her friends immediately worry - and point investigators to her online relationships.

In 2012, a missing person case in North Dakota alerts investigators. They reveal a scheme involving stolen fracking profits, a ruthless conman and his murderous partner.

When an officer pulls over a reckless driver, he unravels a series of murders. Investigators track a sadistic killer with a taste for torture, robbery, and bloodlust.

An introverted student finds a soulmate in the new boy in town. But their romance is jeopardized when she goes to college and he can't contain his jealousy.

A politician and his wife are stalked by their private pilot. He wants to claim the woman for himself and is willing to use his plane as a deadly weapon.

The team investigate a cursed castle in Glencoe, where Clan Campbell murdered over 30 MacDonalds in cold blood as they slept. Can they survive the night?

The team learns the true meaning of "school spirit" at a vacant school. From a ghostly janitor's lair to a freaky encounter, the crew are haunted non-stop.

Tanner discovers deserted Tennessee hospital. Rumours of hauntings surround around this unexplored facility - can the team unlock its secrets?

The team splinters when Tim and Scott attempt to summon a demon despite Sarah and Sapphire's objections. The experiment exposes a new threat directly tied to Karen.

Law enforcement student Amanda Sigers marries med student Sayantan "Sy" Ghose. When Amanda adopts her sister's baby, she discovers that Sy has a dark side.