In 1995, Christa Pike was introduced to Satanism. Her fascination with the dark underworld grows until it comes to a deadly head in the woods one night.

A shooting in a luxury building sends shockwaves through an upscale neighbourhood. Detectives uncover a list of suspects and a plot born out of economic envy.

In Indian River County, Florida, a shoplifting call turns into a deadly pursuit. In Sioux City, Iowa, police use high-tech tools to solve a love triangle murder.

The hunt for Officer Matt Pavelka's killer reveals a web of narcotics and violence stretching across America, with roots to El Chapo Guzman's Sinaloa Cartel.

When Shanann Watts and her two daughters vanished from their home, America was gripped. Experts in body language and linguistics analyse the clues that Chris Watts was responsible.

A jury convicts Glynn Simmons of a liquor store clerk's murder, but Glynn insists he was out of state during the killing. His family calls on Chris and Fatima.

Steven Chaban has been jailed for killing his mother-in-law. His grieving wife calls Chris and Fatima to decide whether Steven is innocent or not.

On Valentine's Day, 2004, a family vanishes from their home in Vaughan, Mississippi. Michael Hargon, his wife Rebecca and their four-year-old son James Patrick are nowhere to be seen.

When 20-year-old student Cathy Torrez is discovered dead in the trunk of her own car, her family won't rest until her killer is bought to justice.

Local football hero TK Kelly carried the dreams of his small California city on his shoulders, but for someone close to TK, jealousy was motivation enough to kill.

A beloved high school teacher's mutilated body lies in a field near her home. The police suspect her husband until the clues lead them elsewhere.

When Shanann Watts and her two daughters vanished from their home, America was gripped. Experts in body language and linguistics analyse the clues that Chris Watts was responsible.

Donald Trump is one of the most controversial figures on the planet. Experts closely examine Trump's words, actions and behaviours.

Roo and the team try to identify "The Handyman." Meanwhile, a new decoy catches the interest of a man trying to lure underage girls into sex parties.

A man with a worrying job starts a relationship with a 14-year-old decoy. A man in another state reaches out to Abby looking to meet up with her and her friends.

In Florida's Daytona Beach in 1989, a torrid affair between a bar owner and a waitress leads to a deadly home invasion and a videotaped murder.

When a recently widowed businesswoman is found brutally murdered in her Little Rock home, police discover the killer is closer to her than they thought.

When a recently widowed businesswoman is found brutally murdered in her Little Rock home, police discover the killer is closer to her than they thought.

In 2014, four women vanish from Chillicothe, Ohio. Fears of a serial killer mount when a fifth woman, Tiffany Sayre, goes missing in 2015.

Police find another body whilst searching for the fifth missing woman. Could it be the work of a serial killer? After an anonymous tip, they get a possible suspect within hours.

Trailer owners, Jason and Stephanie McClurg, suffer a series of misfortunes which put their marriage under huge strain. But nobody expected it to lead to murder.

A couple appear to have the perfect romance. After meeting online, blending their families and spending many happy years together, suddenly they're torn apart.

Robert Marshall loves his money and his mistress. But when his wife hires a Private Detective to catch him in the act, who will pay?

John is on the trail of fugitive Larry Hicks, accused of murdering a woman in Plattsburgh, NY. Callahan heads to Texas to examine accused predator Steven Leifeste.

A shooting in a luxury building sends shockwaves through an upscale neighbourhood. Detectives uncover a list of suspects and a plot born out of economic envy.

In 1995, Christa Pike was introduced to Satanism. Her fascination with the dark underworld grows until it comes to a deadly head in the woods one night.

Experts delve into disturbing cases of psychopathic killers known as "family annihilators," who see family members as simply potential victims.

John is on the trail of fugitive Larry Hicks, accused of murdering a woman in Plattsburgh, NY. Callahan heads to Texas to examine accused predator Steven Leifeste.