A Florida sheriff has called out parents and students after saying his agency spent nearly $21,000 investigating dozens of hoax school threats posted on social media in less than a day.

Volusia County Sheriff Mike Chitwood spoke Friday at a news conference alongside Volusia Public Schools officials, describing the situation as “absolutely out of control.”

Chitwood said that 54 threats were reported to the Fortify Florida app, which allows citizens to report suspicious activity to law enforcement agencies, in less than 24 hours.

“That means investigators in the school district have been running around the clock to investigate these tips, which are all turning out to be false. So far, it’s cost $21,000 to do these investigations,” the sheriff said.

The sheriff said that if a parent knew what their child was up to and did nothing, he’d make sure the parents would get perp-walked with their child.

“This is absolutely ridiculous,” Chitwood said. “Go talk to the families who have lost a loved one in a school shooting. These little knuckleheads think it’s funny. Go talk to those parents and see how funny this is. It’s not.”

The sheriff’s remarks come less than two weeks after a 14-year-old student shot and killed two 14-year-old students and two teachers at Apalachee High School near Atlanta.