Maggie Rulli

Still, there were no signs of a struggle.

A pink table lamp on Angie's nightstand appeared to be untouched.

He documented more than a dozen stab wounds, including a six-inch gash across Angie's left breast, which was exposed.

There were a few small defensive wounds on her arms and hands.

Angie's purple sweatpants had been pulled down to her knees.

She wasn't wearing any underwear.

It appeared she'd been sexually assaulted.

And most striking of all, there was a 14-inch gash across Angie's throat.

Detective Pratt had a theory about that.

As Detective Pratt took in the totality of the crime scene, it seemed to him that whoever had done this had been motivated by pent-up emotion and rage.

He thought this was the type of crime that was likely perpetrated by a lone killer.

Still, he noticed this pattern in the blood spatter along one wall in Angie's bedroom that made him question this lone killer theory.

Imagine if you flicked a wet paintbrush at a wall.

If someone happened to be standing in front of that wall, the spatter would land on them and leave a blank space on the wall behind them.

Essentially an outline or a void.

That's what Detective Pratt noticed on this one wall in Angie's bedroom.

And it made him wonder if maybe the killer hadn't acted alone.

Over the next 24 hours, Detective Pratt and Idaho Falls law enforcement collected physical evidence from the crime scene.

They swapped blood from the wall in Angie's body.

They collected samples of semen and samples of hair from a hair clip, a pink fuzzy toilet seat cover, and from Angie's purple sweatpants.