6 Degrees of Murder

Stories of murder investigations that gradually exposed one truth after another, revealing the sinister underbelly beneath seemingly placid communities.

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.

Thirty years ago, the nation watched every moment of the Menendez Brothers’ dramatic trial in real time on Court TV. Now, thanks to TikTok and social media, an entirely new generation is learning their story for the very first time.

Across the country, high school football unites small-town communities. But when a heinous murder shatters that Friday night dream world, the crime ripples beyond those immediately impacted, and the community will never be the same again.

A 17-year-old girl is murdered. The police have no clues, but a theory arises: she is one of the victims of a serial rapist and murderer. Unpublished interviews and footage bring a shocking revelation about his death.

It's an iconic line in any crime story: when a suspect is arrested and gets to make one call. In reality, once a person enters the criminal justice system, there are multiple opportunities to make calls while awaiting trial. The vast majority of those calls are recorded. An admission, a threat, a slip of the tongue, a bribe -- it's all on tape and the suspect knows it, but this doesn't always prevent people from talking and talking. Jailhouse phone calls are used to frame the narrative of murder investigations steeped in mystery.

Six families uncover long-buried secrets and generational mysteries in an intimate documentary series. Through emotional revelations and shared storytelling, they face their past and confront hidden family truths.