scene, later tracking down the vehicle, where it appears he may have spent in the night. he represented it from this philadelphia store monday he visited a philadelphia storage facility filled with ammunition and more weapons on the evening before the attack. they also show surveillance no cos of the u-haul van crossing into brooklyn at 4:11 a.m. two hours later a man matching his description, wearing a hard hat and construction vest left the u-haul on foot. we obtained this video law enforce. believes to be james, wearing sim is lar clothing, entering two hours before the shooting began. investigators linking the gun found at the scene to a purchase by james sources say. and authorities have tracked the purchase of a gas mask to james through an ebay account. we are learning more about the victims. a man shot in the back of his knee trying to flee the scene.