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A shooting in Mississippi leaves a man fighting for his life. Police use gunshot detection technology to track the shooter before he strikes again.

Surveillance cameras in Ohio capture a drive-by shooting in which a three-year-old boy dies. In Louisiana, a police officer's son is shot dead in a nightclub.

Under Siege / Where's Chynna? Mississippi police turn to city-run cameras to identify suspects of a shooting spree. In Utah, a missing person's case becomes a murder investigation.

When a man is shot dead on the Fourth of July, detectives use social media to track down the killer. In Washington, police investigate a raging fire.

Demetra Smith was living in marital bliss with her new husband, but her happiness was cut short when her stepdaughter finds her shot execution-style in her bed.

For years, Bill, Stephanie, and their three kids hide their torment while struggling to keep up appearances. But in 2011, the façade shatters for good.

In Genoa, Ohio, John Eichner, his wife and kids look like a happy bunch, but behind closed doors a disturbing pattern of torment and gaslighting plays out for years.

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 arrested for historic sexual offences, TV weatherman Fred Talbot tried to hide the truth in police interviews. His repeated response of 'no comment' speaks volumes.

Harold Shipman was a much-loved doctor. Millions watched the GP speaking on TV discussing the benefits of care, not knowing he'd already killed dozens of patients.

Eight-year-old Jamie Lavis was on the bus Darren Vickers was driving before he disappeared. Vickers joined the hunt and spoke on TV - but was hiding an awful truth.

When a woman's millionaire boyfriend reports her missing, police have little to go on in their search. An unlikely witness appears, uncovering a web of deceit.

A popular resident of Eastman, Georgia, mysteriously disappears. As the search for him intensifies, police make a horrific discovery and focus on an unlikely suspect.

11-year-old Carlie disappears while walking home from a friend's house. Detectives uncover disturbing footage of a mysterious man grabbing her.

30-year-old Jennifer is shot dead after a night out. Can surveillance cameras help detectives hunt down the killer before he strikes again.

After the brutal binding, torture and murder of a woman in her home, her ex-husband calls 911, but police suspect he is the killer.

It's For You Guys To Find. The shooting of a family in their sleep leads detectives to uncover a killer they would never expect - a family member with psychopathic tendencies.

A remorseless psychopath who wants revenge against the people closest to him goes on a spree of murder and arson, proclaiming he wants to be heard.

A man calls 911 claiming he found his ex-girlfriend dead. But his behaviour on the call leads police to wonder if he could be involved.

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 arrested for historic sexual offences, TV weatherman Fred Talbot tried to hide the truth in police interviews. His repeated response of 'no comment' speaks volumes.

When a woman's millionaire boyfriend reports her missing, police have little to go on in their search. An unlikely witness appears, uncovering a web of deceit.

A popular resident of Eastman, Georgia, mysteriously disappears. As the search for him intensifies, police make a horrific discovery and focus on an unlikely suspect.

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 arrested for historic sexual offences, TV weatherman Fred Talbot tried to hide the truth in police interviews. His repeated response of 'no comment' speaks volumes.

Harold Shipman was a much-loved doctor. Millions watched the GP speaking on TV discussing the benefits of care, not knowing he'd already killed dozens of patients.

Eight-year-old Jamie Lavis was on the bus Darren Vickers was driving before he disappeared. Vickers joined the hunt and spoke on TV - but was hiding an awful truth.

When a woman's millionaire boyfriend reports her missing, police have little to go on in their search. An unlikely witness appears, uncovering a web of deceit.

Move On. Popular and outgoing, Rowena aspires to be a teen psychologist. But her dreams turn into a nightmare when a pathological love connection shatters everything.

Roger Harris and his wife Donna built their dream home in Florida, but just after the birth of their second son, a vile secret threatens their sweet, simple life.

Robert Foust considered killing his son, Aaron, thinking it would stop him from growing up to be a murderer. Instead, he put himself and his son in God's hands.

I Wished My Son Were Dead. For more than 25 years Joyce Alexander has been terrified of her son. She fears he blames her for his crime and believes he is plotting revenge from jail.

He Almost Got Away With It. Timothy Bass got away with murder for decades, telling his wife, Gina, he was working the night shift. She believed him until she uncovered his secret.

He Said There Were More Of Them. Shirley Gaskins was unaware her father was one of America's most prolific serial killers. But the more people vanished, the harder it was to deny.

The families of two deceased mothers search for answers. Racheyl Brinson's husband says she fell to her death, while Jessica Alva allegedly hung herself.

Officers find a Georgia high school senior's strangled body in flames, sparking a long quest for justice. In South Carolina, a college student disappears.

Three friends show up for a haircut and find their barber dead, dusted in white powder. Cops learn he came into money - was it theft or betrayal.

Charlie and the team uncover aggressive paranormal activity at one of the most haunted places in Scotland, Stirling Old Town Jail.