[TribLIVE] A Pittsburgh man has been charged with a federal crime after police said he placed a backpack containing several homemade bombs in Downtown Pittsburgh on May 31.U.S. Attorney Scott W. Brady announced Saturday that Matthew Michanowicz, 52, of the city’s Duquesne Heights neighborhood, was charged with possession of an unregistered destructive device. He was arrested Friday by Allegheny County sheriffs.
Pittsburgh police responded Monday morning to an open area at 2 PNC Plaza where PNC security personnel reported seeing a "military, green backpack" by a bicycle rack.
The police’s bomb squad found what they referred to as three suspected "homemade Molotov cocktails," identified in arrest papers filed against Michanowicz as "spent OC vapor grenades," which contained a fluid that was leaking out of at least of the devices.