Pistorius

It has been intriguing me. I haven't lost any sleep over it, but i have been wondering: which opposite side of the tale is the truth? Accident or intentional?
After analyzing every information in my possesion, and i might be missing crucial pieces for I'm so far remote, my conclusion is drawn: i believe Pistorius murdered his girlfriend. I feel like the truth is out there, if only the right questions were asked.
Why would she lock the bathroom door if they didn't argue?
Why, while you girlfriend is sleeping over, do you first think of an intruder when you hear noises in the bathroom?
WHY WOULD SHE TAKE HER PHONE TO THE BATHROOM IN THE MIDDLE OF THE NIGHGT?
Why doesn't he insist on a lie detector test?
Who would blindly shoot through a closed bathroom door, even in a dangerous country?
A friend of mine said: well if he killed her on purpose, he's a very good actor since he's been breaking down so bad.
That argument is empty. I believe he killed her. And i believe the decent human being took over and he is crushed by remorse and fear of consequences. I believe that's what making him cry and throw up. I don't believe he is a cold-blooded killer. But I do believe he murdered her. Crime of passion. Male egos get so big.
I could be wrong. Good luck to the judge. I've been on the fence for a while, but currently, my opinion is formed.
Not that it makes a single difference anywhere.