A Columbia man being charged for the killing of a Camdenton teenager in a car crash last year has pleaded guilty. 29 year old Dennis Leporin of Columbia was charged with second degree murder, assault and driving while intoxicated. Police say Leporin was going the wrong way on Highway 54 when his pick-up collided head on with a car driven by 19 year old Chelsea Frederickson of Camdenton. Fredrickson was killed in the collision while a passenger in her vehicle survived. Leporin’s sentencing has been set for August 13th. Prior to sentencing he will undergo a pre-sentence investigation.