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.

Columbo is a friendly, verbose, disheveled-looking police detective who is consistently underestimat...

A criminal psychologist with the ability to see the past through touch and a fearless reporter with ...

A shocking murder in rural Ireland sets off an increasingly convoluted quest for justice that spans ...

A journalist races to learn the truth when human remains are found in the home of self-proclaimed Sa...

Incorporating bodycam footage from the initial crime scene, surveillance video, and interrogation ro...

A reborn gangster accidentally found himself being able to see ghosts, which led to a life-changing ...

Marie-Claude Savard and Sébastien Trudel propose a new investigation into a legal case that captivat...

The mysterious disappearance of a Scottish fishing trawler and a death on-board the submarine HMS Vi...

The story of how Detective Superintendent Steve Fulcher deliberately breached police procedure and p...

Oslo detectives Max Sørensen and Sander Holm are called in to investigate after four young immigran...

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...

The stories of ordinary folks who confront the evil that was always right in front of them. Through ...

Exploring the crimes of infamous serial killer Lonnie Franklin Jr. who preyed on women in South Cent...

Successful insurance salesman Rob Marshall, his bright and devoted wife Maria, and their three sons ...

A compelling, innovative true crime series focused on the role of forensic science in solving some o...

When marriages fall apart, divorce can turn ugly - even deadly. From blushing brides turned cold-blo...

Scorned: Love Kills is an American documentary television series on Investigation Discovery that pre...

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...