Calm down, Mr. O'Meara. Deep breaths........... 
Officer Baker is NOT racing across to that woman for some completely unknown reason. There is a perfectly good reason, which I've offered. And note that Officer Baker is not the only person running towards that woman: there is another woman running towards her also. The woman by the mailboxes is drawing attention to herself. Again, I've offered the reason why.
As for Mr. Shelley. Here's what he tells the WC:
Mr. BALL - What did it sound like to you?
Mr. SHELLEY - Sounded like a miniature cannon or baby giant firecracker, wasn't real loud.
Mr. BALL - What happened; what did you do then?
Mr. SHELLEY - I didn't do anything for a minute.
Mr. BALL - What seemed to be the direction or source of the sound:?
Mr. SHELLEY - Sounded like it came from the west.
Mr. BALL - It sounded like it came from the west?
Mr. SHELLEY - Yes.
Mr. BALL - Then what happened?
Mr. SHELLEY - Gloria Calvary from South-Western Publishing Co. ran back up there crying and said "The President has been shot" and Billy Lovelady and myself took off across the street to that little, old island and we stopped there for a minute.
Upon this narrative, which is completely different to what he said in his same-day affidavit, Mr. Shelley builds the following absurd tale:
Mr. BALL - Do you have any idea how long it was from the time you heard those three sounds or three noises until you saw Truly and Baker going into the building?
Mr. SHELLEY - It would have to be 3 or 4 minutes I would say because this girl that ran back up there was down near where the car was when the President was hit.
Mr. BALL - She ran back up to the door and you had still remained standing there?
Mr. SHELLEY - Yes.
So I repeat the question you evidently are struggling to answer:
Why does Mr. Shelley--------with support from Mr. Lovelady---------pretend for the benefit of the WC that he didn't run off the steps and encounter Mrs. Calvery out by "the corner of the park"?
Officer Baker is NOT racing across to that woman for some completely unknown reason. There is a perfectly good reason, which I've offered. What reason?
What is it about the woman that causes Baker to pull his bike up and race over to her?
What does Baker see in the mass of confusion as he approaches the TSBD that causes him to pick out this woman for special attention?
Why does he then make up some tale about thinking shots were coming from the TSBD building and that's why he pulled over?
Don't mess around.
Nothing cryptic.
Just an explanation that covers these questions.
Why does Mr. Shelley--------with support from Mr. Lovelady---------pretend for the benefit of the WC that he didn't run off the steps and encounter Mrs. Calvery out by "the corner of the park"?
I have no idea why he would try to delete this seemingly innocuous detail. Something he is already on the record as saying. Something he knows he told the Dallas Police.
Maybe he just forgot about it.
Maybe he thought it was an unimportant detail.
Maybe he had more important things to lie about during his WC testimony.
Here's the $64,000 question - why do
you think he didn't mention it?