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When Randy Scheffield's family finds him dead in his bed, they suspect a heart attack. But police uncover a murder conspiracy that will shatter this small town.

When Jeffery Locker is found stabbed to death, detectives suspect he was in the wrong place at the wrong time. But the truth, they learn, is far more shocking.

When Peggy Perez-Olivo is shot in the head her husband Carlos insists they were victims of carjackers. The horror that follows will shock even experienced investigators.

Peter Theriault hasn't missed a day of work in almost 30 years. So, when he fails to arrive for his shift, friends and family suspect something is very wrong.

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 rising star Rebecca Schaeffer is murdered, Hollywood panics. Detectives investigate who killed the beloved actress, and if a copycat killer is on the loose.

31-year-old violinist Helen Mintiks is found murdered in an airshaft at the Metropolitan Opera House. Could there be a real life Phantom of the Opera.

When a tip from a missing persons' network helps identify the body of a John Doe murder victim, investigators' questioning unravels a dark tale of betrayal.

In North Port, Florida, police get a call that a young mother has vanished from her home. A trail of incoming 911 calls leads officers on a hunt for her abductor.

In Dayton, Ohio, a young mother goes missing after attending a party one evening. When her body is found, her identical twin is certain foul play was involved.

When a young woman in Overland Park, Kansas disappears after visiting the mall, store CCTV footage reveals an abduction. Days later, her body is found in the woods.

A psychiatrist and his adult son are killed execution-style. The case goes cold until an attempted armed car robbery provides an odd link to the double homicide.

In Southwest Florida, Terrance Williams, a young father, disappears. When his mother retraces his steps, she uncovers something ominous.

In 1990, two young men confessed to a double murder in self-defence. But 30 years later they have very different stories of what happened that night.

Debra Rode Lambert, older sister of the Oregon serial killer, shares how the warning signs showed in her little brother Jimmy from the age of four.