The reason Oswald is in custody so quickly is the murder of J D Tippit.
But this papers over an under-appreciated reality - that before Oswald was even approached in the Texas Theater he was already on the police radar as a suspect in the killing of JFK.
In a Dallas Morning News article entitled "Suspected Killer Defected To Russia In '59" [dated 11/23/63], Kent Biffle reports:
"Oswald later failed to report at a 1:15 p.m. roll call. Truly reported this to the police."
This is the first recorded mention (I can find) of the roll call that apparently took place in the TSBD during which it was noticed Oswald had left the building. As a result of this roll call, Truly goes to Fritz to tell him Oswald is missing and the wheels are set in motion. Standing close by was Biffle who overheard Truly talking to Fritz and wanted to know what was going on.
Truly recalls the moment in his WC testimony:
"There was a reporter followed me away from that spot, and asked me who Oswald was. I told the reporter, "You must have ears like a bird, or something. I don't want to say anything about a boy I don't know anything about. This is a terrible thing." Or words to that effect.
I said, "Don't bother me. Don't mention the name. Let's find something out."
So I went back downstairs with Chief Lumpkin."
There is a touch of "the lady doth protest too much" in Truly's account of his interaction with the reporter, as if he had nothing to say to him, but Biffle's article has a number of quotes attributed to Truly:
"Truly, who said he had interviewed and hired Oswald "a couple of months earlier", reportedly told the policeman that Oswald was a worker."
"Truly later said Oswald came to work as a temporary warehouse worker. "He was a pretty quiet individual. His work was fine and I had no reason to believe...no idea the man had ever been in Russia."
Truly said as far as he knew, Oswald and a few other workers repairing an old floor were the only persons on the sixth floor Friday morning.
He said most of the building's workers walked out in front to watch the President's motorcade."
In an article entitled "Assassin Crouched And Took Deadly Aim", placed earlier in the same newspaper, Biffle writes:
"R. S. Truly, superintendent of the textbook building, was standing in front of the building. "I just went blank at first...couldn't believe it was happening."
Truly said about 90 people work in the building but most of them were out front at the time the shooting started."
In the same article Biffle describes the moment the police are told Oswald is missing. Interestingly, he doesn't specifically name Truly as the man doing the talking:
"An employee of the textbook firm walked up, "I don't know if you're interested in this...but one of the fellows who works here is gone. Can't find him anywhere."
The police were interested.
"He's 23, about five-foot-nine and weighs around 150 pounds. I'd have to check the payroll records to be sure but I think he's been here a couple of months.
His name is Lee Oswald.""
Although unnamed in the article we can be sure Biffle is reporting the moment Truly tells Fritz that Oswald is missing. This is confirmed by Truly's WC testimony where he describes in detail what he said to Fritz:
"I just told him his name and where he lived and his telephone number and his age, as 23, and I said 5 feet, 9, about 150 pounds, light brown hair--whatever I picked up off the description there. I did not try to depend on my memory to describe him."
It is exactly the same description Biffle reports in his article. It must be remembered that this exchange is something that Biffle was not supposed to hear, he was not supposed to know, let alone report, that there had been a roll call taken at which Oswald was found missing. The problem this raised was simple - there was no roll call. Truly had made this up as a pretense to put the police on Oswald's trail. This becomes evident when we read Truly's testimony regarding the moments leading up to his decision to put Oswald in the frame:
"Then we continued on down, and we saw officers on the fourth floor.
I don't recall that we stopped any more until we reached the first floor. But I do recall there was an officer on the fourth floor, by the time we got down that far."
"When I got back to the first floor, at first I didn't see anything except officers running around, reporters in the place. There was a regular madhouse."
"Then in a few minutes--it could have been moments or minutes at a time like that--I noticed some of my boys were over in the west corner of the shipping department, and there were several officers over there taking their names and addresses, and so forth.
There were other officers in other parts of the building taking other employees, like office people's names. I noticed that Lee Oswald was not among these boys.
So I picked up the telephone and called Mr. Aiken down at the other warehouse who keeps our application blanks. Back up there.
First I mentioned to Mr. Campbell--I asked Bill Shelley if he had seen him, he looked around and said no."
At no point is a roll call mentioned. Truly is looking around and notices Oswald is missing [remember it's"a regular madhouse" at this time], so he asks Bill Shelley if he'd seen him and he says "no" [even though Oswald is reported to have gone home strictly on Bill Shelley's say so].
This brief glance around is enough to convince Truly that Oswald has left the building.
However, Biffle overhears Truly telling Fritz that Oswald had failed to show up for a roll call and that was the reason he was reporting it.
Why would Truly lie to Fritz about the roll call?