The true-crime writer spent the last six years of her life chasing down the infamous California serial killer and rapist.

By providing insight into the mind of a serial killer, Bundy aided detectives in capturing Gary Ridgway.

These are the real-life mobsters and events that inspired the books and movies.

These mafia members continue to be household names long after their deaths.

Take a look at photos of these mafia members after their arrests.

Known as the “Gainesville Ripper,” Rolling terrorized the Florida college town during a three-day murderous rampage in late summer 1990.

Learn about the Butcher of Plainfield and how his disturbing life inspired numerous films.

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 decades 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.

Take an in-depth look at the rise and fall of the Teflon Don.

When the oil tycoon's grandson went missing in 1973, many believed the victim was involved in his own abduction.

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.

Learn about the real inspiration behind the 2017 movie about the Pentagon Papers.