A knife-wielding man allegedly chased a hiker and his dog down a trail above the University of Utah and then charged police who arrived to investigate. The victim came upon a man standing by a tent, police wrote in charges filed Tuesday. The man told the hiker to leash his dog and leave, moved toward the hiker with an object in his hand, and shouted threats as the hiker ran back down the trail, police wrote. When officers later approached the tent, the man ran away but then charged pursuing officers with a knife held over his head. Officers deployed a Taser twice. The man, 46, of Salt Lake City, was charged with three third-degree felony counts of aggravated assault and a misdemeanor count of interference with an arresting officer.