In South Africa, gun owners are required to demonstrate that they are trained in gun safety and are free from mental instability and substance abuse. That alone would prove his clear state of mind as a Human being.
The thing I would try prove is that I was very paranoid about burglaries, and prove how scared I was. This is how I would do it:
In a 2012 interview with The New York Times Magazine, Oscar said he owned a 9-millimeter pistol and he bought the gun because of a false alarm at his home. Well I believe that the same gun was used and it was licensed.
A few months ago I posted on twitter saying: “Nothing like getting home to hear the washing machine on and thinking its an intruder to go into full combat recon mode into the pantry!” November 27, 2012. This will in no doubt prove how paranoid he was about house breaking or burglary.
Now I would prove that we were having a fabulous relationship by calling Sarit Tomlinson, Ms. Steenkamp’s publicist, who told Britain’s Sky News that the couple had a “healthy, fabulous relationship.” I would then review Ms. Steenkamp's Twitter account the day before, which read: “What do you have up your sleeve for your love tomorrow???”
That also would clearly suggest that they were not in a sour relationship.
I would then agree to what the neighbors have said about hearing an argument hours before the shooting. I would say I argued with her and that she left angry, I would then say I wasn't expecting her to be back at that time of the night especially after a huge fight. Anyone would be alarmed if they had noises at night coming out from the bathroom.
I would also prove the element of surprise: the fact that she was short through the bathroom door means that Oscar would have been shocked to hear noises coming out from the bathroom in his ensuite and therefore started shooting without knowing who it was.
Lastly I would prove that I fired a warning short, by pointing to the two shorts I fired and missed. Arguably the two bullets that missed can be labeled as warning shorts.
Last on my closing argument I would call on Andrea Giannini, the sprinter's former coach who said he hoped the shooting was "just a tragic accident". "No matter how bad the situation was, Oscar always stayed calm and positive," Giannini said. "Whenever he was tired or nervous, he was still extremely nice to people. I never saw him violent."
Obviously I’m not Oscar and therefore wouldn’t say such things. I hope he gets a fair trial and that justice prevails.