Like trying to decipher the value of a book without ever opening it, judging a person by his or her outward appearance can be a mistake. Someone may look perfect on the outside, but even the most kind-hearted soul has a dark side looming. "Diabolical" is a docuseries that delves into the minds of murderers, asking a simple question: "Why did they do it?" The acts were committed with extreme premeditation -- many were months or even years in the making. Tension builds in each episode as law enforcement taps into the methods of devious masterminds, aided by insights from forensic psychologists and psychiatrists as well as criminal profilers.

The story of a man named Yook Dong-sik who coincidentally witnesses a murder and picks up the killer...

Each episode features a story centred on true murder case involving the discovery of a shallow grave...

A mother suspects that her son could be the killer of a recently found dead girl, and becomes caught...
With only 15 percent of homicide detectives in the U.S. being women, the working lives of female det...

Detective Andrea Cornell is a tough, thorough Homicide Detective who leaves no stone unturned. Her u...

Overton is a small, countryside village where farming is its bread and butter and race horses are it...

20 years ago Moo-Yeom’s father was a suspect in the "Gap Dong” serial murder case. Because of the de...

Using modern forensic science techniques and criminalistics to revisit the violent murder of an Egyp...

Witness the crime busting techniques and forensic science used by the FBI to break the most baffling...

The peacefulness of the Midsomer community is shattered by violent crimes, suspects are placed under...

Mafia Connection exposes old and new mafia organizations threating Italy.

"Special Affairs Team TEN" is a criminal investigation unit that tackles the most violent crimes in...

A reclusive ex-cop reenters the game as an insurance investigator, searching for clues in crime scen...

A working-class Irish family rules a city built on loyalty and corruption. The Caffee brothers, Tomm...

When Detective Kat Donovan matches on a dating app with the fiancé who disappeared years before, she...

Edward Popielski, a Polish detective, who suffers from photogenic epilepsy, which helps him track do...

When their 4-year-old son is murdered, a young couple fights a twisting and arduous battle trying to...

Former Federal prosecutor Sunny Hostin travels to the sites of America’s most perplexing cases, inte...

Tōko Kisaragi is a detective in the Investigation 1 Section 11 of the Tokyo Metropolitan Police Depa...