NEW : Prosecutor Gerrie Nel says the law requires an evaluation of Pistorius . Gerrie Nel : ' The prosecution has said it will not call a psychologist to testify on behalf of Pistorius. She says he can tell the difference between right and wrong . Pistorius says he mistook his girlfriend for an intruder in the middle of the night .
NEW : Prosecutor Gerrie Nel says the law requires an evaluation of Pistorius . The prosecution has said it will not call a psychologist to testify on behalf of Pistorius. She says he can tell the difference between right and wrong . Pistorius says he mistook his girlfriend for an intruder in the middle of the night .