Are you suggesting Postal was part of some plot to frame Oswald...?
No...If you read it right I have always proposed that certain Dallas Police were.
Not all of them were in on it to be clear.
Only two Texas Theater witnesses together with Brewer were ever interviewed.
This is from lone assassin sacred scripture---
At 1:46 P.M., after an abortive raid on a public library, a police dispatcher announced: “Have information a suspect just went in the Texas Theater on West Jefferson.” Within minutes, more than six squad cars sealed the theater’s front and rear exits. Police armed with shotguns spread into the balcony and the main floor as the lights were turned up. Only a dozen moviegoers were scattered inside the small theater.
https://earlybirdbooks.com/the-assassination-of-jfk-case-closed-gerald-posner-excerptTestimony states that Brewer and Burroughs went in and searched the theater twice and did not see the suspect ...out of a dozen customers? However, when the police showed up, Brewer was able to point Oswald out straight away.
Cops came with shotguns in hand it was reported yet this was not mentioned in Postal/Burroughs/Brewer testimony.
On the other hand...Officer McDonald reveals---
Mr. BALL - What did you do?
Mr. McDONALD - Well, when I got to the front of the theater there was several police cars already at the scene, and I surmised that officers were already inside the theater.
So I decided to go to the rear, in the alley, and seal off the rear. I parked my squad car. I noticed there were three or four other officers standing outside with shotguns guarding the rear exits. There were three other officers at the rear door. I joined them. We walked into the rear exit door over the alley.
Mr. BALL - What were their names?
Mr. McDONALD - Officer Hawkins, T. A. Hutson, and C. T. Walker. And as we got inside the door, we were met by a man that was in civilian clothes, a suit, and he told us that the man that acted suspiciously as he ran into the theater was sitting downstairs in the orchestra seats, and not in the balcony. He was sitting at the rear of the theater alone.
If Oswald was sitting alone, why couldn't Brewer find him earlier?
Gerald Posner pinpoints the time 1:46 PM CST as the end of a library search and a call to the theater.
Four minutes later Oswald was thrown into a police car.
Rather snappy work there by an otherwise sloppy outfit.