For two decades, a predator haunted Denver’s streets and highways. Young women began vanishing, many of them last seen hitchhiking or working along Colfax Avenue.

Their bodies later turned up along I-70, posed in ways that shocked investigators.

The case became one of Colorado’s darkest mysteries, a chilling reminder of how long a killer can stalk a city before anyone knows who they are.

A String of Murders Along Colorado’s Highways

Inside the Hunt for Denver’s Shadowy Serial Killer
Photo by Julia Rodriguez on Unsplash
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Between 1975 and 1995, at least 17 women were murdered in similar ways in and around Denver.

Most of the victims were vulnerable, working as sex workers or living transient lifestyles. The killer preyed on those least likely to be missed.

Their bodies were left in ditches, fields, and along the interstate. Some were even posed grotesquely, adding a disturbing layer of taunting to an already grim pattern.

Who Was Behind the Killings?

For years, police and the public speculated about the “Denver Prostitute Killer.” Were they someone who lived in the area, or someone who passed through town regularly?

Eventually, DNA evidence tied several of the murders to Billy Edwin Reid, who was already in prison for another violent crime.

While authorities suspect he’s responsible for more, not every case has been fully closed.

Solving a Case Decades Later

Advances in forensic science finally cracked open the mystery.

Cold case detectives used preserved evidence to connect Reid to the crimes, bringing at least some measure of justice for the victims.

But with so many cases spanning 20 years, questions remain. Did Reid act alone, or could others have been involved?

A Haunting Chapter in Denver’s History

Inside the Hunt for Denver’s Shadowy Serial Killer
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The Denver Prostitute Killer left scars that linger.

The brutality, the posing of bodies, and the sheer number of victims make it one of Colorado’s most unsettling murder cases.

Read More: Is Hitchhiking Legal in Colorado? Here’s What the Law Actually Says

Even solved in part, the story is a grim testament to how long evil can hide in plain sight and how much work it takes to uncover it finally.

Past Colorado Murders You May Not Know About

Colorado has had some high-profile murders over the years, but there are many murders that occurred before most of which you may not be familiar with.

Gallery Credit: Nate Wilde

Still Missing: See Photos of 40 Colorado Cold Cases From the Past Decade

Scroll through the list of cold cases in Colorado dating back to 2011. While there are hundreds of open cases during the past ten years, this gallery includes all case files from the decade that included a valid photo.

The Top 10 Oldest Cold Cases in Colorado Dating Back to 1911

The following missing and homicide cases are some of the oldest on record in the state of Colorado. Flip through the gallery to see the 10 oldest cases in the state that have a photograph on file.

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