Here is my summary of why OP's story cannot be true (based on his own testimony):
1. He didn't notice Reeva pick up her mobile, roll off the bed on the left hand side despite being less than a metre away and knowing she was awake.
2. The room was pitch black yet Reeva did not turn on any lights (bedroom or bathroom) on the way to the toilet (and also knowing OP was awake).
3. OP couldn't hear Reeva get off the bed (due to the fans) but could hear a sound at the bathroom window approximately 30m away
4. As Reeva's bladder was already empty, there was no reason for her to go to the toilet, and lock herself in.
5. Alternatively, Reeva had to go and use the toilet in less than a few minutes (in pitch black) and use the toilet before OP screamed.
6. OP's gun 'accidentally' discharging '4' times without any intent to harm the intruder
7. OP's version that the police substantially tampered with the crime scene in numerous illogical ways for no apparent reason.
None of it is even remotely possible of being true.
Similar to how the gun just 'accidentally' discharged in Tasha's restaurant despite his finger not being on the trigger.