North Forest ISD police are investigating and parents with whom we talked are upset.
"It's ridiculous," said parent Anthony Tyler. "They got nothing else better to do. We've got enough problems in the school district."
"They had a lot of time because they went from one side of the gym, to all the way to the back of the building," said a former employee of the district who didn't want to be identified.
And what did the graffiti say?
"We gonna kill the principal, the principal is a 'B'," he said.
The school district does have surveillance cameras on the campus and we are waiting to hear more from the police about their investigation and what those cameras might have captured overnight.
For now, we do not have any word on the people or person responsible.