Investigators reveal concerns about behavior of Michigan high school shooting suspect leading up to the tragedy - CNN

Crumbley, 15, was charged as an adult Wednesday with terrorism, murder and other counts in connection with Tuesday's shooting that killed four students and injured seven other people at Oxford High School north of Detroit.

The first behavioral report came Monday, when "a teacher in the classroom where he was a student saw and heard something that she felt was disturbing," Oakland County Sheriff Michael Bouchard told Brianna Keilar on CNN's "New Day."

"And they had a counseling session about it with school officials, and a phone call was left with the parents," he said.

Then on Tuesday -- hours before the shooting -- "a different teacher in a different classroom saw some behavior that they felt was concerning, and they brought the child down to an office, had a meeting with school officials, called in the parents, and ultimately it was determined that he could go back into class."

Authorities say Crumbley soon opened fire outside a school bathroom.

He moved through a hallway at a "methodical pace," prosecutors said, shooting at students in hallways and classrooms before surrendering in what's become the deadliest shooting at a US K-12 school since 2018 and the 32nd on such a campus since August 1.

Bouchard declined to detail what the teachers' concerns were, adding that his department was "never informed of either meeting prior to the shooting or that there were any concerns about behavior."

When asked why Crumbley was allowed to return to class on Tuesday, Bouchard said: "That will all be part of the investigation, in terms of what they thought, and why they thought that that was the right step."

Cell phone videos refer to killing students, officials say

After the shooting, investigators found two videos on Crumbley's cell phone -- made the night before the shootings -- in which Crumbley talked about shooting and killing students at the high school, sheriff's Lt.

Tim Willis said at Crumbley's arraignment Wednesday.

Another piece of evidence investigators uncovered is a journal that was in Crumbley's backpack that detailed his "desire to shoot up the school to include murdering students," Willis said.

The weapon authorities said was used in the shooting, a 9mm Sig Sauer SP2022 pistol, was purchased by Crumbley's father four days before the shooting, Bouchard said Tuesday.

Asked about Crumbley's parents' knowledge of what their son was writing or recording before the shooting or his accessing the new weapon, Bouchard on Thursday told CNN: "We don't have any information that they knew that this was a path he was headed.

that's very much an active investigation."

Oakland County Prosecutor Karen McDonald said Thursday that her office is determining whether Crumbley's parents should be charged and she expects an announcement by Friday afternoon.

McDonald has said that firearm ownership comes with legal responsibilities such as securing the gun properly and ensuring ammunition is kept separate.

The prosecutor has declined to go into detail, citing the investigation.

CNN has attempted to reach Crumbley's parents and is attempting to identify their attorney.

How authorities say the shooting unfolded

In court Wednesday, prosecutors said video from school surveillance cameras showed Crumbley with a backpack, then a minute later exiting a bathroom without the backpack and with a gun in hand.

Crumbley began firing outside the bathroom, prosecutor Marc Keast said.

That continued for another four or five minutes until he went to another bathroom, Keast said.

Video from the school shows the assailant fired at the victims at close range, often aiming at the head or chest, Bouchard told CNN.

Survivors coping with trauma and grief

As investigators continue to comb through details from the shooting, students who lived through the terrifying ordeal are struggling to cope in the aftermath.

JaVon Pittman, a student at Oxford High, said he took cover as the incident unfolded.

"We put the table at the door, barricaded the doors, and we just turned the lights off and we hid under the desk," the 17-year-old told CNN on Wednesday.

He called his father while he was hiding, whispering that there was a shooting at his school, JaVon said.