EXCLUSIVE: Man claiming he would “shoot up” Marion school has re - WSIL-TV 3 Southern Illinois

EXCLUSIVE: Man claiming he would “shoot up” Marion school has record of prior threats

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MARION, Ill. — When 21-year-old Treston Miller was arrested and charged with making terrorist threats for a number of online posts claiming he would “shoot up” a school in Marion, it wasn’t the first time he’d been in custody for threats.

It wasn’t even the first time he’d threatened a school shooting.

Documents obtained exclusively by News 3 show Miller threatened to shoot up Marion High School when he was a student in 2012. 

According to a probable cause affidavit filed by the Marion Police Department, Miller sent an online message to a local business saying “Shooting M High”, followed by an expletive. 

During the exchange he used the the username “CT Shooter”.

The incident happened just one week after the shooting at Sandy Hook Elementary School left more than two dozen people dead. 

Miller, who was 15, was taken into custody by Marion Police for making terrorist threats. 

Because juvenile records are sealed, it’s unclear if any additional action was taken.

At the time, Miller told a detective he was interested in school shootings. 

In another incident last year, Miller was arrested and charged with reckless conduct for reportedly pushing his mother to the ground and threatening to kill his entire family. 

Millers mother told police that he had said he wished he could get a gun

She also claimed he said that because the city only had four ambulances, if he shot everyone in the house only a limited number of people would be saved. 

During an interview with police on that occasion, Miller said that he had schizophrenia and that he had not been taking his medication. 

The reckless conduct charge was later dropped at his mother’s request. 

Miller currently facing three counts of making terrorist threats, a Class X felony in Illinois.

He could serve up to 90 years in prison if convicted. 

Miller is being held in the Williamson County Jail on a $1 million bond. 

Police say he has confessed to making the recent threats. 

He will appear in court for a preliminary hearing on August 30.

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