By Sunday, what actual evidence of a "conspiracy" was found? Even getting "murdered live on TV while in police custody" doesn't have to mean a conspiracy.
Are you joking or being intellectually dishonest? Hoover, Johnson, and Katzenbach were aware of the Mexico City issue by Sunday:
"Memos were circulating at the highest levels of government concerning Oswald, Kostikov and the latter’s role in KGB assassination operations.30 And
over at the FBI the documentary record within the first 24 hours was already considerable. There were those lower down in the FBI who had listened to the tapes, and there were memoranda circulating among the top four men in the FBI and Secret Service Chief James Rowley.31 The situation at CIA was similar.
Besides personnel at the CIA Mexico City station, memoranda about the voice comparisons began circulating among senior officials at headquarters by Sunday, November 24th, two days after the assassination. 32
https://www.pbs.org/wgbh/frontline/article/oswald-the-cia-and-mexico-city/The case was open. The Mexico City stuff hadn't been fully investigated at that point and people in the National Security community were suspecting a connection between Oswald's Mexico trip and the assassination.
Clearly, they had reasons to suspect that others might have been involved and it's unreasonable to argue that they ruled out a conspiracy "based on the evidence within the first 48 hours". They hadn't even confirmed Oswald's palm print on the rifle at that point.
You know that, do you? By Sunday, it was increasingly farfetched that Oswald was less a James Bond sleeper agent and more what he actually was: a disgruntled wife-beating malcontent who hated America.
None of which precludes the possibility that he was a patsy or part of a conspiracy.
People who live and work in the intelligence spook and organized crime world are often not as likable in real life as the Hollywood actors who portray spies and contractors in the movies.
For example, many of the Cuban Exiles who participated in the CIA's covert ops against Cuba became contract killers and drug traffickers.
https://www.nydailynews.com/news/national/cocaine-cowboys-gave-drug-money-cia-tied-plot-kill-castro-article-1.3532426I don't assume that anyone who engages in that world is a choir boy. They're not all bad or immoral people but there are lots of shady characters.
I see. Another "gut feeling".
To you, "rumors" are as good as facts.
Diplomats are intelligence agents. They're basically spies but not undercover. Ambassador Mann was in Mexico City at the time. He knew more about the cloak and dagger stuff that was going on down there than you will ever know. You may not like his testimony but you can't easily dismiss it because he was in a position to know about Oswald and the places he visited in Mexico City.
President Johnson saying that he NEVER believed Oswald acted alone isn't a rumor. He said it in an interview. That proves that some who initially endorsed the Warren Commission did so for political expediency.
Historical Context matters.
When the Warren Commission was established were they told that? Was the FBI? Not every conspiracy claim or "gut feeling" will prove out and should be exposed as rumors.
The CIA admits that they hid stuff from the Warren Commission. Other agencies likely did as well. The fact that some agencies hid stuff from the Warren Commission is no longer a conspiracy theory, it's a conspiracy FACT.
The Katzenbach memo was the origin for what the Warren Commission was intended to do.
JFK had a connection to Sam Giancaca. His father knew lots of Mafia guys. DeMohrenschidt knew Jackie Kennedy when she was a young girl. Lots of coincidental ties. And what CIA officials did Oswald have a close personal relationship with?
I didn't say "CIA officials". I said people with connections to the "intelligence world". The intelligence/spook world is far broader than just the CIA. It includes, the FBI, diplomats, intelligence assets (DeMohrenschildt), contractors (David Ferrie), exile groups financed by the CIA (Carlos Bringuer and the DRE), and foreign intelligence agents.
Throughout his life from his time in the Marines til his death, the intelligence connections are numerous. Far more than your average joe in Texas at that time. In spite of all that, he might've acted alone. I don't assume that the dots connect between those things but there's a lot of smoke.