(CNN) — Moments before a 17-year-old unleashed gunfire at Iowa’s Perry High School, killing a sixth grader and wounding five other people, the student reportedly posted a foreboding TikTok video.
The post showed Dylan Butler – who also died amid Thursday’s horror, a law enforcement official told CNN – inside a school bathroom with a blue duffel bag and a caption that read, “Now we wait,” several news outlets, including the Associated Press, reported.
Law enforcement officials now are analyzing Butler’s post, along with others on TikTok and Reddit, and interviewing the shooter’s friends, the AP report said, citing the official.
New details also are emerging about whether Butler may have been bullied, though his motive might never be confirmed. He was found with a self-inflicted gunshot wound, said Mitch Mortvedt, assistant director of the Iowa Department of Public Safety Division of Criminal Investigation.
Still, investigators are trying to determine why Butler entered the school with pump-action shotgun and small-caliber handgun, Mortvedt said. Officers also discovered a rudimentary explosive device after the killer went on the deadly rampage before classes started on the first day back to school since winter break.
The attack marked the second shooting on a US school property in just the first few days of this year. Last year, more than 80 such shootings erupted on school grounds nationwide, a CNN analysis shows. The US this year also has suffered an average of at least one mass shooting every day in which at least four victims are shot, according to the Gun Violence Archive.
Now, survivors and witnesses in a small city near Des Moines are echoing the same sentiment as others who have suffered the horror of mass shootings in America:
“It doesn’t feel real,” student Rachael Kares told CNN. “This is like one of those things where you see on TV and you’re like that never gonna linger its way toward my community, but it does happen. It’s really real.”
‘Everything just went to chaos’
As students dug into cafeteria breakfasts and wrapped up band practice Thursday morning, one of their peers stepped into the building with two guns and began firing – sending kids and teachers scrambling for safety.
The shooting happened before the classes at Perry High School, which shares a campus with Perry Middle School. “It’s our understanding that there was a breakfast program going on, so there may have been students of different grades … in the school at that time,” Mortvedt said.
At first, the gunshots were mistaken by some as disruptive noise – a popped balloon, a dropped bag – two witnesses said.
Then the horror of reality set in.
Nearby, Kares was wrapping up jazz band practice when she heard four shots resonate through the hall. A burning smell lingered in the air. Then another shot came.
“Our band teacher looked at us, and he just goes, ‘Run!’” she told CNN’s Anderson Cooper. “None of us hesitated. We just all got up and ran.”
Kares and her friends ran outside, trying to get “anywhere away from school,” she said. “We just kept going.”
More than 150 federal, state and local officers to arrive found students and staff sheltering in place or running from the building, Mortvedt said.
Inside, officers discovered the wounded gunman, as well as the explosive device, which authorities rendered safe, Mortvedt said.
The sixth grader who was killed has not been publicly identified. Four other students were injured, Mortvedt said. The principal, Dan Marburger, also was wounded, according to officials in another school district.
All Perry district schools will be closed Friday, and counseling will be available.
The gunman’s friends describe bullying
While the motive in the attack remains unclear, two teens described as friends of Butler said he had been bullied since elementary school, they told ABC News.
CNN is reaching out to authorities about whether the bullying claims have turned up in their investigation.
Stunned community searches for healing
Mourners grieved the loss of the slain sixth grader, who was “the sweetest boy – the one you want your kids to be friends with,” Perry resident Jessica Conrad told CNN.
The principal was identified as one of the wounded in a statement from the Easton Valley Community School District in eastern Iowa, where Marburger graduated. The district learned of his injury through “family connections we have in our area,” it said. Marburger has worked at schools in Perry for at least 25 years, according to the Perry Community School District’s directory.
Mourners gathered for a vigil at a local park Thursday night, clutching candles as speakers shared messages of strength, sympathy and unity.
Some expressed shock and disbelief, including a mother who said her husband tried to drop their children off early at the school butwas turned away.
Later in the day, the question, “What now?” began to weigh on her, Farmer said. “I think you can start to feel kind of powerless.”
Several vigilattendees offered up prayers, including local pastor Kathy Benton, who prayed for the students who “are going be dealing with the memories and the sounds and everything.”
CNN’s Hannah Rabinowitz, Amy Simonson, Evan Perez, Aaron Pellish, Caroll Alvarado, Sharif Paget, Dakin Andone and Christina Maxouris contributed to this report.
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