Grim story of the death of District Heights, Md. resident Valicia Demery, only 19. The AP via WTOP reports her beaten body was found by a jogger at about 6:30 a.m. Sunday on the running track at Forestville Military Academy, the high school from which the victim had recently graduated. WJLA has heartbreaking reaction from Demery’s family and friends, plus this detail: “Demery’s father Garrett says that she left the family home around 4…