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.

Dexter Morgan, a blood spatter pattern analyst for the Miami Metro Police also leads a secret life a...

A dark psychological crime drama starring Idris Elba as Luther, a man struggling with his own terrib...

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

Investigation Discovery joins forces with reporters from People magazine to tell stories of high-end...

The story of the rise and fall of the Baltimore Police Department's Gun Trace Task Force — and the c...

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 ...

Saeki Shuichi was a detective, but he quit his job. He now works at a detective agency. One day, a c...

Two detectives are dispatched to investigate the murder of a young girl on the outskirts of Dublin, ...

The series tells the story of a criminal investigation into the murder of businessman Paulo Gomes de...

Killed Without A Trace explores the cases where police and prosecutors try to prove a murder has hap...

In an isolated village in the north west of Ireland, a murder investigation begins when Garda Barry ...

When her teenage son is jailed for murder in Bulgaria, flight attendant Jo enters a murky world of d...

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

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

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

A true-crime series examining the most shocking murder investigations and toughest trials in Texas h...

On a cold December morning, the limbs of a young man are discovered in Loch Lomond, sparking an inte...