A mass stabbing takes place at Franklin Regional Senior High School outside Pittsburgh . Three others -- a school security guard , Assistant Principal Joan Mellon and patrolman William Assistant Principal Sam King brings down the suspect , according to police . Hide Caption King is celebrated on social media as `` a hero '' and `` man of the year ''
A mass stabbing takes place at Franklin Regional Senior High School outside Pittsburgh . Assistant Principal Sam King brings down the suspect , according to police . Hide Caption King is celebrated on social media as `` a hero '' and `` man of the year ''