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Eyewitness reports and surveillance footage played crucial roles in the subsequent investigation. UVU campus cameras captured an individual dressed in dark clothing, wearing a baseball cap with an American flag, walking with an unusual gait, and climbing onto the roof of a nearby building. The suspect moved out of view briefly but was later seen low-crawling and then running across the roof, carrying an object consistent with a rifle. He then descended and fled the campus, leaving behind a trail of forensic evidence.