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MURRYSVILLE, PA. — Detectives believe a boy charged with stabbing 21 students and a security guard at his Pittsburgh-area high school threatened two students by phone before the attack, according to a search warrant.
The warrant, obtained for the home of Alex Hribal hours after last Wednesday’s rampage, said two students received “threatening phone messages and completed calls” from someone believed to be Hribal.
District Attorney John Peck said the two male students who got the calls were not among those stabbed or slashed in the attack, which occurred minutes before the start of classes at Franklin Regional High School.
Neither Peck nor the warrant say when the calls were made.
