There is only one question you need to answer to understand what really happened; Why did the investigators and the WC ignore Bowley completely? One of the main witnesses in the Tippit case, the one who called the DPD dispatcher, the one who - together with Callaway - helped put Tippit in the ambulance.....They completely erased him from the case. He is not mentioned in the WC report at all..... Now, why do you think is that?
This is pretty simple. Bowley didn't see anything. The killer was gone by the time he arrived.
And, we know from the police tapes that Bowley did not really arrive at 1:10 so there was no need to call him to testify about anything. The Commission discounted Bowley's time of 1:10 because (again) the police tapes tell us that his watch was clearly wrong by about five or six minutes.
As for your constant relying on Bowles and the clocks, please explain how any of that is supposed to show that the police tapes were off by more than two minutes.