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July 20, 2017

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Law enforcement personnel stand outisde the Delaware Valley Charter School Friday, Jan. 17, 2014, in Philadelphia. Police say up to three boys may have been involved in the shooting of a couple of fellow students in the gym at the school.

Matt Rourke / AP

Law enforcement personnel stand outisde the Delaware Valley Charter School Friday, Jan. 17, 2014, in Philadelphia. Police say up to three boys may have been involved in the shooting of a couple of fellow students in the gym at the school.