Newtown school shooter Adam Lanza made such disturbing drawings and wrote graphic essays in school that one of his teachers reported him to the principal.

Prosecutors shared pictures the 20-year-old drew back in 5th grade that prominently featured a murderous grandmother with a “rifle cane.”

At some point in the drawings, Granny uses the cane to gun down the Beatles, a hockey player and an entire Marine battalion.

He gives detailed description of Granny’s other weapons including a handgun, an AK-47, an M-16, a musket, a shotgun, and a rocket launcher.

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He also wrote obsessively, in particular a series of 10-page essays on “battles, destruction and war.”

“Adam’s creative writing was so graphic that it could not be shared,” a teacher said in a sworn, written statement three weeks after the Dec. 14, 2012, massacre at Sandy Hook.

One of the characters in Lanza’s “Big Book of Granny” says, “I like hurting people … especially children.”

In a series he called “Granny’s Clubhouse of Happy Children” a character suggests they play a game of “hide and go die.”

“Hi! I’m Bobolicious the Explorer,” the character says, “Remember last time when everyone was slaughtered? Well . . . you bread-brain leeches gave me 75 years of prison for that so-called ‘Tragedy’! I was having fun!”

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In one section, his homicidal characters visit a day care center.

“Let’s hurt children,” says a character dubbed Dora the Beserker.

“Adam’s level of violence was disturbing,” the teacher said. “I remember showing it to the principal at the time … I remember instructing Adam that he had to write something else to share with the class.”

At the end of that school year, Lanza would be abruptly pulled out of school.

“After my years of experience in teaching . . . boys, I know how they are supposed to act,” the teacher said. “But I saw Adam as being not normal with very distinct anti-social issues.”

She recalled seeing officers confront his brother Ryan Lanza on the news after the shooting.

“When I was watching the news about the Sandy Hook school incident and saw Ryan Lanza in handcuffs, I knew it would be Adam and not Ryan,” she wrote.

Investigators uncovered other compositions in Lanza’s home. One screenplay on his hard drive titled “Lovebound” was about a relationship between a 10-year-old boy and a 30-year-old man.

Another document titled “tomorrow” contained the 6-foot 112-pound Lanza’s personal goals, including staying thin.

Sources: New York Daily News, ABC News

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