LAWRENCEBURG, Ky. — The man arrested in connection with school shooting threats last month had written a manifesto to send out to news outlets that detailed his plan to be "the next school shooter of 2018,” according to court testimony Thursday.

Dylan Jarrell, 21, was arrested Oct. 18 after FBI agents and Kentucky State Police stopped him as he was backing out his driveway with the the “tools necessary” in his car to carry out a school shooting.

New details were revealed Thursday in a preliminary hearing in Anderson County District Court, where Judge Donna Dutton raised his bond to $500,000 from $50,000, finding probable cause for the charges. Last month, Jarrell pleaded not guilty to terroristic threatening and harassing communications.

In court Thursday, Kentucky State Police Trooper Josh Satterly talked about his interactions with Jarrell and what police discovered last month.

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Police previously said Jarrell had a firearm, more than 200 rounds of ammunition, a bulletproof vest and a 100-round magazine.

On Thursday, Satterly said that Jarrell had an AR-15 in his car and that he was “moving the attack up” when authorities stopped him at his house that afternoon.

Satterly has been credited with investigating a tip from a New Jersey woman who said Jarrell sent her threatening and racist Facebook messages. Satterly said he contacted the FBI after he was made aware of a prior investigation by the FBI into Jarrell.

According to state police, the FBI questioned Jarrell in May about "social media threats to a school in Tennessee."

When Satterly arrived at Jarrell’s home to investigate the complaints, FBI agents had already stopped the man.

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Jarrell admitted to authorities that he sent the harassing messages to the New Jersey woman and gave permission for police to search his phone, car and home.

Police found a “threatening manifesto” saved on Jarrell’s phone detailing a planned school attack, Satterly said. It included the names and contact info for "every major news outlet around the country" that Jarrell planned on sharing the manifesto with.

The manifesto referenced past school shootings around the country that Jarrell had researched, Satterly said.

Jarrell later told police he planned to attack a school “near Anderson County” but did not name a specific school, Satterly said in court. Jarrell lives just blocks away from Anderson County High School.

The threats caused schools in Anderson and Shelby counties to cancel some activities on Oct. 19, the day after Jarrell's arrest.

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In addition, police found notebooks in Jarrell's home that included details on past school shootings, such as when and where they occurred, who carried them out and how many people died, Satterly said. Jarrell also had a checklist of "four or five things” he still needed to carry out an attack, including a pressure cooker. Satterly did not name the other items during his testimony.

Satterly said Jarrell was interviewed twice on Oct. 18, and that Jarrell told him he suffered from anxiety and schizophrenia and was seeing a therapist. When asked if he was suicidal or needed to be taken to a hospital, Jarrell said, “No, I’m fine,” according to Satterly.

Satterly added that he has not reviewed medical records for Jarrell.

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Jarrell’s attorney, Amy Robertson, on Thursday asked the judge to lower bail, arguing Jarrell did not carry out the attack and it was a "thought crime." Robertson said no allegations have been made that Jarrell illegally possessed the weapons and ammunition that police found.

Anderson County Attorney Tiffany Azzinaro disagreed and said evidence shows Jarrell had intent to attack schools.

“I don’t know how many calls I’ve gotten from parents that are concerned about their children,” Azzinaro said.

A grand jury will hear the case at a later date, when it will decide whether or not to indict him. Azzinaro told the Courier Journal the Commonwealth Attorney’s Office will take over future prosecutorial duties.

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Reach Billy Kobin at bkobin@courierjournal.com or 502-582-7030.