(WPXI)-Canonsburg Police are asking for help in locating a missing teenager. Fifteen year old Joshua “JJ” Harsh did not come home from Canon McMillan High School on Thursday afternoon. Harsh is 6 feet 3 inches tall and weighs 190 pounds. He was last seen wearing black sweat pants and a dark colored hoodie and was carrying a backpack. If anyone has information regarding Harsh’s whereabouts, Canonsburg Police ask that you contact 911 to ensure prompt police response.