The principal got wind of Vanderbeek's alleged threats on Tuesday, and in the course of speaking to students about them, discovered several troubling Snapchat videos, prosecutors said.
One Snapchat showed a clip from the TV show "South Park," where characters are holding rifles and loading a handgun; the caption says, "Where do you see yourself in 10 years." When the video ends, a caption states: "I see myself dead in the end."
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Another Snapchat shows a green-and-black biohazard symbol with a quote, "It will become fine dust among the land of Egypt with boils breaking out on man and beast exitis-99" -- an apparent Bible verse, Exodus 9:9, that talks about ending the world and killing people.
Vanderbeek was taken into custody and is being held in the Ocean County Jail. It wasn't immediately clear if Vanderbeek had an attorney who could comment on his behalf.
A letter from the superintendent, Gerald North, addressed the arrest.
"We, as always, have the safety and security of our students first and foremost in our decision making," North wrote on the school distrcit's website. "Please understand this situation was dealt with promptly and professionally to insure the safety at, as well as the memories from the graduation of the Class of 2018."
