I have always thought the cricket bat came first as there was so much screaming according to ear witnesses. Whilst I am sure she would scream when shot the first/second time there would have been very little time for there to be continued screaming. I think he hit the door to frighten her and when she wouldn't stop screaming he collected his gun and fired. I appreciate there has been a comment from one of the expert witnesses about the shot coming before the door was split but what if the split was minimal until the shot had been fired. That panel would then break and OP would be able, after the murder, to prise the door panels apart.
MOO
There is still a possibility that the split through the bullet hole marked D occurred during the prising off part of the panel and not from the original blow by the cricket bat .
Final arguments from Nel will be very interesting to us all especially in this regard . I feel he will surely need to mention what he believes the first bangs were.