With his last known killing in October 1969, people still know very little about the murderer — including his name.

The life Dennis Rader lived on the outside hid his dark secret, which he was so desperate to reveal by dropping breadcrumbs to the media.

Author Jeff Guinn reveals how even as a child, Manson showed disturbing signs of becoming a serial killer.

The killer's early years featured problematic behavior and hints of the darkness that led to him becoming a serial rapist and murderer.

The lives of these people ended too soon as a result of the cult's California killing spree.

After 40-plus years of rumored mob dealings, alleged burial sites and dead-end tips, investigators aren't any closer to cracking one of the country's most notorious unsolved cases.

His chosen field of study came in handy when targeting women. And his college-boy persona fooled not only his victims, but the authorities as well.

Here are some of the central figures of the Manson Family who actively participated in the gruesome crimes that left nine people dead in the summer of 1969.

Separate myth from reality by looking at nine facts about the famous criminals.

Take a look at the pictures of these notorious murderers after their arrest.

His heinous crimes and murders sentenced him to life in prison, but after less than three years behind bars, the cold-blooded killer became the victim.

The divorced, single mom had a long-term relationship with the serial killer. He tried to kill her once — but she didn't know until later.

In honor of A&E’s Biography event, 'GOTTI: Godfather & Son,' we take an in-depth look at rise and fall of the Teflon Don.

Mobster John Gotti was not afraid to share his opinions, to say the least. Here are some life lessons straight from the Teflon Don.

The new TV drama 'Trust' centers its story on the dramatic kidnapping of John Paul Getty’s 16-year-old grandson, John Paul Getty III, and implies the victim was involved in his own abduction. We take a look at the real stories behind four generations of the Getty Family.

The home-grown terrorist responded to a Harvard reunion query by calling his current occupation as 'prisoner' and his eight life sentences as 'awards.'

The much-anticipated second season of 'American Crime Story' examines the events leading up to Versace's death and explores the cultural context of his murder, including the homophobic climate of the 1990s.

In Steven Spielberg's 'The Post,' Meryl Streep brings Katharine Graham's 1971 decision to have the Washington Post publish the top secret Pentagon Papers to life. However, there's only so much that one film can include. Here's the real story behind 'The Post.'

The fierce rivalry between professional ice skaters Tonya Harding and Nancy Kerrigan took on a life of its own and secured a place in popular lore.

Considered one of the most notorious serial killers of the 20th century, cult leader Charles Manson died on Sunday from natural causes.

The new Lifetime film, 'Oscar Pistorius: Blade Runner Killer,' attempts to get to the root of the relationship between the once-inspiring sporting hero and the woman he killed on Valentine's Day 2013.

As Robert Durst awaits trial for the 2000 murder of friend Susan Berman, what some believe to be his original sin aired in the Lifetime movie “The Lost Wife of Robert Durst.” The film imagines the events leading up to the 1982 disappearance of the notorious real estate scion’s first wife Kathleen Durst.

Here's a primer on the true-crime case of brothers Lyle and Erik Menendez who were sentenced to life in prison for murdering their parents in 1989.

David Berkowitz, who became known as Son of Sam, went on a murderous rampage in New York City during the 1970s, taunting and insulting police, until they captured him. Here's a look back at his notorious case.