TRUE CRIME: The murder that sounds like a script from a horror movie.

It reads like the script of a B-grade horror movie.

What started out as an innocent movie night between four friends ended with a murder so twisted, so brutal, it left an entire community in shock.

On the night of September 22, 2006, 16-year-old Cassie Jo Stoddard was house-sitting for her aunt and uncle, Allison and Frank Contreras, in her hometown of Pocatello, Idaho.

Pocatello is a quiet, largely-Mormon town in southwest Idaho. The kind of town where everyone felt safe and kids didn’t have curfews. The kind of community who never saw this horrific crime coming.

Cassie Jo was a junior at Pocatello High School and that night she decided to invite three of her classmates over to the house to keep her company. She invited her boyfriend, Matt, and two of Matt’s friends – Brian Draper and Torey Adamcik.

The start of the night was pretty uneventful, as the four teens began to watch a movie together. About half way through the movie, Draper and Adamcik announced they were going to see a film at the local movie theater instead.

Approximately 15 minutes after the two teens left the house, the electricity suddenly went out.

Cassie Jo was frightened so Matt immediately called his mother to ask permission to stay the night to keep her company.

But then the lights suddenly went back on and Matt's mum came to pick him up.

What happened next is spine-tingling.

Brian Draper and Torey Adamcik re-entered the house. The teens had been lying in wait outside the home, looking for the perfect opportunity to get Cassie Jo on her own.

They entered through the basement, once again cut off the power, and waited for Cassie Jo to go down to the basement to turn the power back on.

But scared, Cassie Jo remained in the living room.

A short time later, Draper and Adamcik went upstairs, disguised in dark clothing and masks, and stabbed their classmate to death.

An autopsy revealed she had been stabbed approximately 30 times, nine of the wounds were fatal.

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Two days later, Cassie Jo's 13-year-old cousin found her dead on the living room floor. The next day, Draper and Adamcik were arrested and charged with the murder.

During their interrogations, the teenagers blamed each other. But eventually police found a video of the two boys planning the murder. They also found video footage of Draper and Adamcik talking about the murder right after it happened.

Draper then led police to a canyon where he and Adamcik had hidden the knives used the murder and the clothes they were wearing that night.

At their trials, it was revealed that Draper was obsessed with the Columbine High School shootings and he idolised the shooters, Eric Harris and Dylan Klebold.

Adamcik was a horror movie buff and he would admit to being inspired by the Scream movie franchise.

Both teenagers admitted they wanted to kill someone - anyone - and Cassie Jo housesitting for her aunt and uncle created the perfect opportunity for them.

They said they liked Cassie Jo but she was just an easy target for them.

Allison and Frank Contreras never returned to their home, choosing to never again set foot in the house where their niece was cruelly murdered. They've tried to sell the house, but year after year it remains on the market.

Both Brian Draper and Torey Adamcik are serving life sentences in jail.

They don't regret their actions that night and admit if they'd never been caught, they would have go on to murder countless more innocent victims.

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