The suspected Michigan high school shooter wasn't disciplined despite what some teachers called "concerning behavior," the school's superintendent says.

Oxford Community Schools Superintendent Tim Throne said that while the recent shooting suspect, 15-year-old Ethan Crumbley, had been previously called to the office, he was never penalized.

"I want you to know that there has been a lot of talk about the student who was apprehended, that he was called up to the office, and all that kind of stuff," Throne said in a YouTube video posted Thursday. "No discipline was warranted. There are no discipline records at the high school."

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Throne confirmed there was a meeting between Crumbley and school officials three hours before he allegedly fatally shot four students and wounded seven others.

"Yes, this student did have contact with our front office. And yes, his parents were on campus Nov. 30 … This is as much information as we can give you today," Throne said.

Oakland County Sheriff Mike Bouchard stated during a Thursday press conference that two teachers from Oxford High School had reported Crumbley for "concerning behavior" earlier this week. He declined to provide details about what that behavior entailed.

Crumbley also "had a counseling session" on Tuesday after a teacher observed "something that she felt was disturbing in terms of" the 15-year-old's behavior, Bouchard told CNN's New Day on Thursday.

Throne reaffirmed that the school would remain closed for weeks while the investigation continued. The superintendent compared the high school post-shooting to a "war zone," noting that it looks like a "wreck right now."

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The shooting on Tuesday lasted approximately five minutes, and 30 rounds were fired, hitting 11 people, officials said. Crumbley had 18 rounds remaining.

Crumbley was charged as an adult, and he faces four counts of first-degree murder, one count of terrorism causing death, seven counts of assault with the intent to kill, and 12 counts of possession of a firearm in the commission of a felony. If convicted, he could face life behind bars.