Hi Park enthusiasts, I'm your host, Dilya DeAmbra, and the story I'm going to tell you about today takes place in Grand Canyon National Park.

It's a park that's name and iconic landscape is known across the globe. Some people prefer to hike the rocky terrain on foot, while others book a helicopter to tour the canyon and see the winding Colorado River cutting through it.

The parking compass is 1.2 million acres of rock formations, forests and deserts. According to the National Park Service, the feature most people know as the true Grand Canyon is located entirely in the state of Arizona.

It's one of the most steady geological landscapes in the world.

Archaeologists have reported that the ground in the Grand Canyon is super rich with fossils that reveal a ton of information about the history of North America.

In April of 1993, the secrets of one man's life that he thought were fossilized, far beneath the surface for decades, resurrected, and revealed a horrible monster no one expected was lurking in Grand Canyon National Park.

This is Park Predators.

To begin this story, we have to start a little ways away from Grand Canyon National Park in the town of Littleton, Colorado.

Trust me, we'll end up in Arizona, just hang in there.

To cover the entire landscape of this story, we also have to hop back in time a few decades to Saturday morning, December 30, 1978.

That morning, Timothy Trevithick was trying to get his 15-year-old girlfriend, Susan Spangler, to open her bedroom window.

The Spangler's house on Franklin Way in Littleton, Colorado was like many of the others on that street. Two story, well kept, but this particular house was the focus of Timothy's whole world in 1978.

He pelted the side of the house with pebbles, but Susan's face never showed up in her window like usual.

After a while of getting no reply, Timothy figured Susan must be somewhere else in her family's house, and according to the Denver Post, he decided to go inside to look for her, heading straight through the house's front door.

It was unlocked, so he walked right in.

In the front hallway, he called out Susan's name, but she didn't answer.

Everything was oddly quiet, which seemed strange, considering that Susan lived there with her 17-year-old brother, David, her mom Nancy, and her dad, Robert. The family of four was never this quiet.

When Timothy walked into Susan's bedroom, he found her lying there in her bed under the sheets. At first, he thought she was just still sleeping, but when he went to shake her, he realized she wasn't waking up.

When he pulled away the bedsheet, he saw clear as day that she'd been shot in the back.

Timothy immediately started to panic, and ran into Susan's older brother's room to get help, but when he got there, he found David dead too.

Someone had shot him in the chest and covered his face with a pillow.

At that point, Timothy called the Arapaho County Sheriff's Office to report the deaths and get deputies to the scene right away.

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