NEW : Second witness says she was awoken by shouting . NEW : Husband of first witness also takes the stand Tuesday . Pistorius shot and killed Jan Steenkamp at his Pretoria home last year . The double - amputee Paralympic and Olympic athlete says he mistook her for a burglar .
NEW : Second witness says she was awoken by shouting . NEW : Husband of first witness also takes the stand Tuesday . Pistorius shot and killed Reeva Steenkamp at his Pretoria home last year . The double-amputee Paralympic and Olympic sprinter says he mistook her for a burglar .