And the Hello friend.

Welcome back to foul play.

Serial murder begins with a single act, the inception of a killer's deadly career.

Often, it's not until multiple lives are tragically taken

that law enforcement becomes aware of their existence.

Each victim with their own story, aspirations and loved ones, is ruthlessly robbed of their future.

Investigators scrutinized patterns searching for the telltale sign of a killer's unique

method and signature.

Uncovering a trail of historical unsolved crimes. This revelation

ignites the resurgence of cold cases, prompting a relentless pursuit of justice.

The Zodiac Killer did not differentiate between gender, age, or background.

He operated in multiple locations, in daylight as well as under the cover of darkness.

He had used a gun and a knife in his attacks, looking to raise the bar on each successful strike.

By 1969 the Zodiac Killer had shown his violent and murderous intentions four times. At Lake Herman Road, he took two victims lives. Six months later,

at Blue Rock Springs, another life was stolen, with one terrified survivor.

Before the year was out, another attack was launched that upped his violent streak in his level of depravity.

At Lake Beriesa, a fourth life was taken,

with a second man only just managing to survive. A month later, in another method flip, the Zodiac took his fifth life.

A cab driver in San Francisco, seemingly chosen at random.

He had no chance to react to the gun that was placed against the back of his head.

A chilling resemblance emerged between the murder of Paul Stein, slain within the confines

of his own yellow cab, and a hauntingly similar crime from seven years earlier.

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