A family friend of an Atlanta power couple offered new insight into what happened just before they were involved in a deadly shooting near Piedmont Park. Atlanta Business Chronicle broadcast partner WXIA-TV 11Alive reported Atlanta Attorney Tex McIver and his wife, Diane, were riding in a car with a friend Sunday night near the park when Diane handed a gun to Tex, who was in the backseat, concerned about people approaching the vehicle. Crane said they kept driving and the gun went off shooting…