NEW : DNA links Hannah Graham to death of The University of Virginia student , source says . He 's also a suspect in the disappearance of student Jesse Matthew . A license plate check revealed he was wanted , CNN affiliate KPRC reported . Virginia Tech student was last seen on 17 .
NEW : DNA links Hannah Graham to death of The University of Virginia student , source says . He 's also a suspect in the disappearance of student Jesse Matthew . Virginia Tech student was last seen on 17 .