Bizarre Triple Homicide May Have Been Cult Killing

Aug. 19, 2009— -- Early on the afternoon of Jan. 3, 2001, authorities in the tiny Rocky Mountain outpost of Guffey, Colo., found Carl and JoAnna Dutcher dead from multiple gunshot wounds inside their home.

Immediately, investigators sensed that this was no ordinary crime, yet it would take months for them to unravel the bizarre circumstances that culminated in an unspeakable triple homicide: Was it all a twisted version of the children's game Simon Says?

After discovering the Dutchers' bodies, investigators quickly zeroed in on their 15-year-old grandson, Tony. He had been visiting at the time of the murders, but was nowhere to be found.

Police called the boy's mother, Jennifer VanDresar.

"I just kept saying, 'You have to find my son, he's hurt, you have to find him,'" she remembered telling the police. "Then it came to me ... and I said, 'He's in the fort.'"

The "fort" was a makeshift campground about 100 yards up a hill overlooking the Dutchers' home.

Here, in this place meant for innocent play, investigators would discover another horrific crime scene: Tony's body was found in a sleeping bag, his throat slashed almost to the spine.

Alongside the body lay an unfinished Scrabble game, a clear indication that Tony had not been camping out alone that night.

Tony's mother told police that Isaac Grimes, Tony's one-time best friend, was supposed to be joining her son for a camp-out.

Initially, Grimes denied being anywhere near Tony Dutcher on the night of the murder, saying he hadn't seen him since school let out for Christmas. Eventually, under pressure from his mother to tell the whole truth, Grimes made a shocking confession: He had killed Tony.

Not only did he confess to the murder, but he also told investigators the entire twisted story leading up to Tony's brutal death: The murder was a test of his loyalty to Simon Sue, leader of a bizarre paramilitary cult called the Operations and Reconnaissance Agents, or O.A.R.A., and made up of seemingly harmless high school boys.

In an exclusive interview with "Primetime," Grimes shared the details of his horrible crime -- revealed to police back in 2001 -- for the first time in public.