What if he is telling the truth, I think he is. Most sociopathys do not show the emotions that Oscar showed in court, he was truly a broken man for what he did.
Living in the type of society in South Africa I can see people are always looking over their shoulders. And again if he would not have had that damn gun in the home she would be alive.
I have heard of so many cases in the US where parents shoot their children thinking they are intruders.