11 Prolific Serial Killers Most People Have Never Heard Of

Published December 18, 2021
Updated November 7, 2024

Brutal Murderers: The Hillside Strangler

Hillside Strangler Kenneth Bianchi

Los Angeles Public LibraryKenneth A. Bianchi, the Hillside Strangler who terrorized Los Angeles along with his cousin Angelo Buono between 1977 and 1979.

The trouble started in January of 1976, when Kenneth Bianchi moved to Los Angeles to live with his cousin Angelo Buono.

The pair found themselves short of cash, so they formed a plan to make money as pimps, pressuring teen runaways to prostitute themselves in return for living accommodations.

It was an ill-fated scheme, and when things seemed to be falling apart, they took their anger out on prostitute Yolanda Washington — their first kill.

It was the beginning of a pattern. They began to rape and strangle other runaways and prostitutes, posing as undercover cops and luring the women into their vehicles before dumping the bodies in the hilly area northeast of Los Angeles.

When they started abducting women with no history of drug use or sex work from middle-class neighborhoods, the media sat up and paid attention, giving the duo — assumed then to be just one person — the moniker “the Hillside Strangler.”

As the investigation was heating up in Los Angeles, Bianchi decided to make a run for it. He moved to Washington — but he didn’t stop killing.

Two murders there led authorities straight to him, and the M.O. of the killings matched that of the Hillside Strangler — effectively tying him to the deaths in California.

Angelo Buono

Los Angeles Public LibraryAngelo Buono, left, is arraigned in the Los Angeles Criminal Courts Building. 1979.

When Bianchi couldn’t convince the court psychologist that he was insane, he flipped on his cousin, and the pair were sentenced to life in prison, bringing an end to the stranglers’ reign of terror.

But the drama very nearly cost one more life when Veronica Compton, Bianchi’s girlfriend, tried to strangle a woman in an effort to convince the authorities that the real Hillside Strangler was still at large.

The attempt failed, and she was caught and arrested — bringing the sad story to a close after a total of 12 murders.

author
John Kuroski
author
John Kuroski is the editorial director of All That's Interesting. He graduated from New York University with a degree in history, earning a place in the Phi Alpha Theta honor society for history students. An editor at All That's Interesting since 2015, his areas of interest include modern history and true crime.
editor
Austin Harvey
editor
A staff writer for All That's Interesting, Austin Harvey has also had work published with Discover Magazine, Giddy, and Lucid covering topics on mental health, sexual health, history, and sociology. He holds a Bachelor's degree from Point Park University.
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Kuroski, John. "11 Prolific Serial Killers Most People Have Never Heard Of." AllThatsInteresting.com, December 18, 2021, https://allthatsinteresting.com/prolific-serial-killers-murderers. Accessed February 20, 2025.