Vandals shattered glass on campus, leaving behind a threatening letter tied to a brick. Sheriff's officials say the letter had a devil's face painted on it.
"I've just seen how many places have gotten vandalized about this, personally I think it's crazy," former student Heavenly Harris said.
Someone also posted flyers along Interstate 40 at Highway 42 that read, "Teal and white shall fall in red. Eleven of June forever dead." The flyers were time stamped 06:06:06.
West Johnston Principal Brookie Honeycut sent a voice mail alert to parents, letting them know that security would be tight for graduation.
On Friday evening, sheriff's deputies pated down people and waved metal detecting wands in search of any signs of danger before the ceremony.
"I think this is good," parent Mary Gilbert said. "It doesn't seem to be hampering the progress of the graduation they planned it really well."
But when the 468 graduates turned their tassels and tossed their caps, nothing out of the ordinary happened.
"I think it was called for with everything that was said ahead of time and I think everything went smoothly because of it," parent Jerry Gross said.
The SBI and the Johnston County Sheriff's office are still investigating.