RELATED STORY: Pa. high school senior dies of ‘sudden cardiac incident’ after helping at soccer game As family and friends grieve, the cause of death is in for a 12-year-old taken way too soon while warming up for school basketball practice. As TribLive in Pittsburgh reports, Jayson Kidd, 12, of Bridgeville, Pa., died of natural causes involving his coronary artery, according to the Allegheny County Medical Examiner’s Office.