Pistorius not guilty

See http://www.bbc.co.uk/news/world-africa-29143540 . I hear Oscar Pistorius has been found not guilty of the murder charge but may yet face a custodial charge. Not being there, I am in no position to judge. I just hope the final verdict is fair to all involved. Clearly Pistorius fired the gun, but what s unclear is whether he intended to kill the occupant of the toilet where his girlfriend was. Even if he believed that an intruder was in the toilet, were 4 bullets needed?