Parents at a Bedford County school are concerned after a student's stepfather threatened to return with a gun.
The incident happened Wednesday at Thomas Magnet School on Tate Avenue in Shelbyville.
Tyrone Watts, 43, became angry with school staff when he was unable to remove a student from school early.
"Faculty there tried to reason with him," Captain Tony Barrett said. "He went to try to pick up a stepchild, [but he] didn't have permission to pick up that stepchild and he just became irate."
Watts allegedly threatened to return with an AK-47 and "shoot everybody" and then take his own life.
Watts was charged with felony of filing a false report. He has also been banned from all Bedford County schools.
He was jailed and released on $10,000 bond.
Watts was rearrested Monday morning for violating the terms of his probation.
Records show Watts was previously convicted of multiple felonies and is not allowed to possess a firearm.
A January 8 court date has been set.
Concerned parents told Nashville's News 2 they were notified of the threat Sunday.
"We should be given the opportunity to make the decision when our children possibly are in harms way," parent Dina Brown said.
Superintendent Mike Bone said the school system made a mistake by not notifying parents sooner about the incident.
"We would apologize for not getting them better information and quicker information and we will do our best to see that doesn't happen in the future," he said, adding, "We feel that we are safe and secure as any school, more safe and secure than probably a lot of schools."
School officials confirmed an officer will be on duty at the school throughout the week.
The Tennessee Bureau of Investigation is assisting in the investigation.