wow - just wow - that was some real pain right there. I don't think anyone could fake that kind of heartbreak. Almost made me cry.
But it could be that he is just overwhelmed by this whole case? The position he is in? The end of his running career? End of endorsements? End of "hero-dom? And very possibly - end of his freedom, at least for some time?
Reeva's death and discovering her body are the beginning point of all that has wrong in Oscar's life - all that has catapulted him to the position he is in today.
So IMO, it's hard to say whether that "hearbreak" is actually for Reeva, or is it for his whole situation? Because "discovering" Reeva in the toilet is the beginning of all of this.
Yes, I'm sure he has a lot of guilt and sorrow and regrets over, what I think, was a rash of anger that he could not and did not control. And yes, I'm sure he also feels sad and has emotions about ending Reeva's life.
But it's human nature to fight to protect yourself first and foremost.
And right now, Oscar is in "fight" mode, IMO. Fighting for his freedom. At this moment, I don't think his #1 concern or priority is Reeva, I believe his #1 concern and priority at the moment is Oscar, and getting Oscar out of this mess, and getting Oscar free.
So because of this, I believe the tears and sobbing are actually for himself and for this whole situation he is in. And I do believe that some of it is staged - meaning that, he knows he has to appear very sad at certain times. At those times, I believe he starts to think about his own position in life, his own struggles, his own tribulations - and THAT is what causes his uncontrollable crying/sobbing.
JMO.