CHESAPEAKE, Va. (AP) -- Sniper suspect Lee Boyd Malvo has mental diseases that left him "psychologically numb" and legally insane because he couldn't tell right from wrong, a defense psychiatrist said. During the months he lived with convicted sniper John Allen Muhammad starting in 2000, Malvo lost his sense of identity and became vulnerable to Muhammad's wishes and "intense, coercive persuasion," psychiatrist Neil Blumberg testified Wednesday in Malvo's murder trial. Malvo's dissociative disorder that allowed him to tune out reality, his depression and a childhood "conduct disorder" of shoplifting and cat-killing all meant Malvo was "unable to distinguish between right...