I heard the report of the sentencing on U.S. TV at the doctor's office while waiting to pick up my wife. The newscaster said (in part):
One of the other men in the waiting room muttered, "Somebody needs glasses." When you hear "mistaking her for an intruder," especially unexpectedly like that, it does sound slightly absurd.
Now if you're presuming Pistorius was guilty of knowingly shooting his girlfriend in a fit of rage (and I am) where he got lucky was, 1) he fired at her through the door without being able to see her. Thus he was free to claim he didn't know it was Steenkamp. He could claim, "I thought it was an intruder," and realistically, no matter how preposterous it seems, there was very little chance the prosecutor could PROVE Pistorius knew it was his girlfriend. Second, Steenkamp died without ever regaining consciousness. Had she lived long enough to make a statement to police, maybe everything is different. As it stands only one person on this earth knows what really happened and that person is Oscar Pistorius.
If he was guilty of deliberate murder of his girlfriend hopefully he'll punish himself far worse than any court can. People like him usually do.