I know people who moved here from South Africa and the stories they told me would curl your hair. It makes America look like the cradle of safety. It would not suprise me if Pistorius gets off on intruder argument.
I think the media would like the story to be about (male) domestic violence. Because the crime rate in South Africa is so high, it is plausible that Pistorius thought there was an invader (which is not to say he is telling the truth—I don’t know), but the media doesn’t want the story to be about the high crime rate in South Africa.