Thirteen-year-old Keith Simons brought a long gun and a backpack carrying ammunition, bottle rockets and batteries into Jackson Memorial Middle School last Tuesday.
He went on to commit suicide in the bathroom, but no-one else was hurt.
Police Chief Mark Brink said the student had a memo on his phone expressing admiration for the Columbine shooters.
A statement also detailed an eight-step plan of “attack” which Simons started creating on Valentine’s Day.
According to the township police, the teenager wrote: “I’m going to die doing it, I hate those people, when they interview my parents and ask how they didn’t see the signs they should know it’s not them it’s me and it’s because of how I see the world.
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“I’d hurt and destroy something bigger but my schools an easy target.”
In an earlier entry littered with spelling mistakes, the wannabe school shooter wrote: “I’ll look in to those scared little b** before I kill them. I’ll have followers because I am so awesome I know someone will follow me just like I followed Eric Harris and Dylan Klebolt’s.
“Me and them want close to the same thing, it’s going to be fun.
“They say school shootings are horrible but they don’t think like us, like me Eric and Dylan…..”
Eric Harris and Dylan Klebold were the adolescent mass murderers who killed 13 people at Columbine High School in 1999.
The duo took their own lives in the school’s library, where they had already murdered 10 others.
When they released Simons’ documents, the police chief said they showed that Simons intended to conduct a school shooting and harm other individuals.
Brink said it does not appear anyone had prior knowledge that Simons was planning a shooting.
On the morning of the shooting, Simons got off the bus and went directly to the bathroom.
Reports say he then walked out of the bathroom with the gun.
Four students were in the hallway at that time, but they did not see the weapon.
Brink said Simons returned to the restroom, where another boy saw the gun and rushed to report it to school officials.
The police chief said: “Why he went back into the bathroom after he came out holding the gun and then committed suicide? We don’t have an answer.”
The Summit County Medical Examiner’s Office confirmed that he died of a gunshot wound to the head from a semiautomatic rifle.
Through the end of the school year, there will be two officers at the high school, two officers at the middle school and one at the elementary school.