An 18 year old from St. Louis drown yesterday at Perche Creek in southern Boone County. The teen was wading in the water when he slipped into a deeper section of water and went under the surface. Onlookers tried twice to make a human chain to help the teen as he kept going under and resurfacing multiple times but were unsuccessful. The teen finally went under the water for the last time and did not come back up. The teens body was recovered at 535 pm and he was pronounced dead at the scene. This is the 2nd drowning of 2012 for Missouri State Highway Patrol Troop F.