He said, I have my hand around your neck, and if you scream, I'll do you in.

I'm Scott Weinberger, investigative journalist and former deputy sheriff.

I'm Anasiga Nikolaazi, former New York City homicide prosecutor and host of investigation discoveries true conviction.

And this is Anatomy of murder.

Palo Alto, California is an idyllic northern California city, perhaps best known as the crown jewel of Silicon Valley, the birthplace of tech giants like Facebook, Apple, and Google.

It's also home to Stanford University, whose gorgeous campus in the foothills of Santa Clara County has attracted some of the

world's best and brightest young people for over a century. But back in the 1970s, this particular

part of California became infamous for another reason, serial murder. The San Francisco Bay Area

was an absolute hunting ground for prolific killers like

Edward Kemper, who murdered 10, the still unidentified zodiac killer, who killed at least five,

and of course, Ted Bundy, who sexually assaulted and killed dozens of young women. And as it turns

out, Paulo Alto was the home to yet another

predator who, until recently, had gone unidentified for more than 40 years. Today's story begins back

on February 13, 1973, when a recent Stanford graduate, 21-year-old Leslie Perlop left the local law library where she worked.

Here's Sergeant Noie Cortez from the Santa Clara County Sheriff's Department,

who has headed the Cold Case Division since 2016.

She was accepted to go to law school.

She had recently moved back to live with her mother in the city of Los Altos.

Her father had passed away six months prior. So she had been living with her mother and she was also

working in the law library at the Palo Alto Courthouse.

Along with being an aspiring lawyer,

Leslie was also a passionate student of the arts and literature and had the promise of a bright future.

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