I agree with the evidence. I just don't agree with your FUBAR analysis of the evidence. It is comical that anyone could look at the Z-film and conclude JBC was not hit until Z270.
Many/most CTs argue that JBC was hit some time in the mid-Z230s. While I disagree with their assessment, it is reasonable based on JBC's assessment. It ignores JBC's obvious arm flip at Z226 but it recognizes the obvious gyrations JBC went into following the arm flip. Your scenario is just plain cuckoo.
Who said JBC did
not immediately fall back upon being hit on the second shot but twisted around for several seconds afterward? (answer:no one) Who said he did fall back immediately? (JBC, Powers, Nellie, Greer, Gayle Newman-all, apparently as cuckoo as me).
CTs accept that JBC is reacting by z235 because they want to believe that two shots were fired in a space of 20 seconds or less. But, according to the 45+ who swore the last two shots were close together, and Altgens, Powers, Nellie, Greer, Hickey, only one shot has occurred at that point. So the SBT does not rebut the CT scenario: by affirming, despite the evidence, that JBC has received his chest wound by z235, it feeds it.
Funny how cases are solved by key witness evidence. But, in this case, all the witnesses happened to share the same recollections that, co-incidentally, all fit together perfectly but were just imagined. Amazing.