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PLAINFIELD, Ind. (Jan. 2, 2016) — The person who sparked a scare at Plainfield High School before Christmas break is posting online again.

On Saturday, the person going by the Facebook name “Brian Kil” posted he would “turn Plainfield High School into a graveyard.”

Students return from winter break on Monday. Plainfield police are investigating the post, along with a couple other posts mocking school security.

Detectives say they have no update for the media at this time.