Grim details emerged this afternoon in the death of 13-year-old Alexis “Lexie” Glover, of Manassas. We mentioned briefly this morning that Glover’s mother, Alfreedia Leona Gregg-Glover, had been charged with neglect in the death of her daughter, who was developmentally challenged. Well the Post is now reporting that police have evidence that Gregg-Glover placed her daughter’s body in a Woodbridge area creek bed before she reported her missing to police. Gregg-Glover has not been charged…