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Diabolical

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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 10-episode 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.

Latest episodes

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Gina Coccia comes home from work to discover the bodies of her girlfriend, Lynn, and Lynn's nephew, Ronnie, shot and stabbed on the kitchen floor; the investigation leads police to a terrifying act of betrayal.
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After losing her husband in a tragic accident, a God-fearing Cindy McKay claims she has to bend the law to pay off his illicit debts; authorities soon realize that Mckay is a criminal mastermind.
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A cold morning in December starts off like any other, then a farmer finds the body of a dead woman; what seems like a rape and murder case turns into a conspiracy, and someone's diabolical nature is soon revealed.
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After her home is invaded and her husband murdered, Shaunna Dodd recounts her harrowing ordeal at gunpoint; however, when investigators dig deeper, they uncover a tale of lies, infidelity and shady characters who have wandered into the Washoe Valley.
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Terror strikes during a young family's evening stroll in La Mirada, Calif.; nothing seems to add up during the criminal investigation, with the truth taking years to emerge.
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Air Force veteran Michael Giles disappears along with his savings of $206,000 and detectives find a that Kwaneta Harris has been draining his accounts.
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In 2015, Detective Scott Sanderson finds himself investigating one of the strangest cases of his career, involving a missing woman and her newborn; before long, he uncovers a diabolical scheme that will destroy the lives of everyone it touches.
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When Samuel Johnson Jr. suddenly vanishes, investigators find themselves face-to-face with two sisters who know something; through a series of interrogations, they reveal an elaborate murder plot meticulously engineered by a puppeteer.
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On April 17, 2015, a Virginia hunter makes a grisly discovery in the woods, finding a woman with an execution-style gun shot wound to the back of her head.
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In 2017, Federal Heights, Colo., is filled with fear when 69-year-old veteran Bill Mussack is reported missing, gone without a trace; police act fast to uncover a diabolical killer with a heinous plot before the malicious murderer strikes again.
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Three men die over a span of a dozen years, with no suspicion of wrongdoing and no files charged; but when a deadly car explosion rips through downtown Pensacola, Fla., a new investigation begins; all suspicion points toward just one person.
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Penny Knell is admitted to a special care facility, where a devious mastermind is waiting to prey on vulnerable people; when Penny's family gets ensnared in her web, the consequences will be fatal.
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Single mother Rainey Morin meets soul mate Robert Kowalski who treats her like a queen; however, beneath Kowalski's kind veneer is a dark history that threatens to wreak havoc.
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In West Bloomfield, Mich., a simple affair between two coworkers turns complex as the two lovers are willing to do anything, even commit murder, to protect their darkest secret.
aired 38 days ago
Lyle and Carol Kopenskey are high school sweethearts who marry after graduation; after 40 years of marriage, one of them becomes involved in an extra-marital affair that leads to cold-blooded murder.
aired 38 days ago
Valuing wealth more than love, Michelle Donohue casts aside good men before meeting Mr. Right who gives her a taste of her own medicine and sends her down a murderous path.
VOD available
A burning car is found by the side of a highway on the same night a single mother of two is reported missing; the two events are related and connecting the dots leads investigators to a notorious criminal who has been hiding in plain sight.
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Donna Scrivo hasn't seen her adult son, Ramsay, in days, and she's worried; she alerts the police, but days pass with no sign of him anywhere; then the discovery of a severed head and body parts along a highway reveals an act of shocking violence.
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In 1994, Lake Orion, Mich., is rocked by a murder; at first, the crime is a mystery -- but in a small town where everyone knows each other, rumors start flying; police soon expose a strange and twisted plot that no one saw coming.
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In Prichard, Ala., loving father Re'Mano Campbell is found murdered in his home; it takes the cunning wit of local investigators to unravel the mystery of who murdered him.
airs in 10 days
After Cynthia Roth drowns in the middle of a crowded lake, investigators uncover a decades-long trail of terror; detectives must take extraordinary measures to catch the killer.

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