Leach said that Masipa found Pistorius to be a “shocking” and “unreliable” witness, but then went on to accept his claim that he honestly believed his life was in danger, without evidence to support it.
Have faith!
I feel I have to comment on this because it is just not correct.
It may be Leach's interpretation that OP was "unreliable" but - and this is the critical point in the first instance - Masipa never said OP was an "unreliable" witness. If she had done this then I would be queuing up to join the prosecution supporters. Relying on an unreliable witness is a definite no-no in this sort of situation.
In the first instance it is about Masipa's judgement.
She said he was a poor, evasive witness. So were other witnesses in the trial. The only untruth she mentioned was about his intention when he picked up the gun. A theme that continued when he claimed he had no intention to shoot when he heard the noise despite saying he did in the same sentence. Masipa judged (I think correctly) that this fell into an area of testimony for which she cited where an accused untruth may be evaluated as not critically affecting the overall reliability of his evidence.