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Accused rapist claims "John Tucker Must Die"-style plot

A teen accused of sexual assault claims that he was the victim of a conspiracy to frame him
Is teen in sex assault case the victim of a movie-based conspiracy? 01:56

PHOENIX -- Attorneys for a 19-year-old accused of sexually assaulting and molesting more than a dozen girls at his former high school say there is a "treasure trove" of evidence proving the girls lied about the abuse, but the lawyers want further access to Facebook accounts to prove it.

Tyler Kost, who appeared in an Arizona courtroom on Monday, was arrested last May for sex crimes against 13 girls between 13 and 17 years old, most of whom were former classmates at Poston Butte High School, in San Tan Valley, Ariz.

The Pinal County Attorney's Office says Kost faces 30 charges in three indictments ranging from sexual abuse to child molestation.

Kost's defense said new evidence taken from Facebook and Instagram proves the women lied about sexual abuse.

The prosecution handed over 98,000 pages of social media records from several of the alleged victims, but Defense Attorney Michael Alarid said he needs the communications of at least 8 other people to determine how far the plot spreads.

The court documents reveal a group Facebook chat where three of the accusers and three witnesses made plans to "teach a lesson" to Kost and referred to the movie "John Tucker Must Die," where ex-girlfriends take revenge on a former boyfriend.

The exchange happened weeks before the women accused Kost of sexual assault, reports CBS affiliate KPHO.

"He needs to be taught a lesson," one girl said in the Facebook conversation. Another said, "We need to come up with a plan. And yes. We should sacrifice him to Satan."

The conversation later continued, "Lets (expletive deleted) with his mind and his car .... I already know this is just gonna be so much fun!"

Facebook's privacy policy prevents the defense from gaining access to the other records, Alarid said. Only law enforcement can request the information from Facebook, he said.

"Quite frankly the fact that the state is refusing to get any additional social media records is concerning. It's shocking. Based on what we've uncovered so far they should be dismissing several charges. Instead they are digging their heels in and they are refusing to give us anything additional," Alarid said.

Prosecutor Shawn Jensvold said the records are not in the state's control and can't be turned over to the defense.

Further, he said, the defense has not demonstrated a substantial need for the information. Jensvold said that the Facebook conversation only shows that three of the victims might be involved in a revenge plot, but not the other 10 victims.

"It's not the state's job to go on a fishing expedition for the defense, which is very clear within the case law," he said.

The judge expects to rule in the next few weeks on the defense motion to access additional Facebook communications in the case.

Kost was arrested after the Pinal County Sherriff's Office received a tip accusing him of sexual assault against five victims.

He was booked on two counts of sexual assault and two counts of sexual misconduct with a minor.

Detectives later identified eight other girls who said they were sexually abused by Kost. A spokesman for the sheriff's office said that in at least one case Kost threatened, harassed and told a victim to kill herself.

In another, a victim said she became pregnant when she was raped after a Poston Butte homecoming dance.

Kost has been held in a Pinal County jail for more than a year.

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