What if... we take away the "Marrion Baker story" from the narrative? Then what do we have? Absolutely nothing. The Baker story could very well have been the vehicle with which the public gets to the TSBD. Without it there is nothing.
When it comes to the grassy knoll as a firing position there are many "vehicles"; many different witnesses that have told how and why they believed the shots came from the knoll. And the FBI/WC made nothing of all these statements.
But when it comes to the "TSBD shots" there is only Marrion Baker (supported only by Brennan and Euins) that was sure someone was firing from up there. Looking closely at his statement(s) doubt arrives - as we have explained in the article "the Coke Incident, Captain Fritz´s Notes and the Limo Stop".
Baker´s story becomes pivotal.
Now, was Oswald outside with his fellow workers during the shooting?
Yes, most likely he was. Like I have said before, Fritz´s notes are just something that makes for confusion - some of it is probably true, some of it is false, with the intention of muddy the water. And I believe "they" had to control Oswald as soon as the firing stopped.
Did they order him up to the second floor lunchroom? I doubt it, possibly he was inside on the first floor (helping newsmen to the phone etc) in close contact with someone, someone who controlled him and possibly waited for the station wagon to get back.
It seems as if the second floor lunchroom incident was created to reinforce the Baker narrative and at the same time alienate Oswald from his fellow workers, making him a loner and a possible assassin. Without the Baker story, who could tell the world that Oswald was in the second floor lunchroom 2 minutes after the shots? No one.
And, as I said, without the Baker story, you have noting that points to the TSBD, you only have 51 witnesses that points to the grassy knoll.
They needed the Baker story bad. And Capt. Fritz´s notes reinforce the Baker story. And remember, Baker ran to the TSBD when all other people ran to the knoll - he would rather follow the pigeons than the people running to the knoll, because he did not report having seen anybody shoot from up there.
So, was officer Baker in on it? Most likely. There is no other way in my opinion. If Officer Baker was not in on it and knew nothing of the plot - it would mean that Baker ran like a crazy person straight into the TSBD, not knowing how many shooters lurked inside... still he ran with the revolver like a cop bent on suicide, cause they could still be there with their weapons drawn and Baker knew nothing of the number of shooters. Talk about suicide mission!
What could have been expected of a policeman in this situation? Well, think of how the Dallas Police acted when they went after Oswald in the Texas Theatre - there they surrounded the theatre to make sure they could apprehend the suspect without danger to themselves. Back to the TSBD - Baker had no such thought - perhaps because he knew what to expect..?
And I also would like to raise the question of what would have happened if Oswald had stayed at the TSBD and not "gone home"? My opinion is that the DPD/FBI could not have arrested him. They had to get him away from 411 Elm Street in order for him to be a suspect in the Tippit killing, which was the vehicle with which they could arrest him. Had Oswald stayed, the whole case would have failed. And that is why he was driven straight to the Texas Theatre (and a second Oswald went to his rooming house, while other people killed officer Tippit.)