(Westmoreland County, PA) -- The trial for the teen who allegedly stabbed 21 people at Franklin Regional High School is being postponed until September. A judge agreed Tuesday to delay the proceedings so Alex Hribal's legal team has more time to prepare. Hribal, who is 19, is in prison on 21 counts of attempted murder. Police say Hribal used kitchen knives in the 2014 rampage.