It would be hard to believe that most of what is released hasn't been sanitized or altered in such a was as to make it much of nothing. We can only hope.
This is gonna be a long post, so bear with me. TLDR: LHO in Mexico City, rife with contradictions, questions, and what did he really do and how was he able to? 60 years later things still very vague.
On the JFK deal one of the things that I find so nebulous and odd is that more attention isn't paid to LHO's time in Mexico City just before the assassination. For those of us from CDMX this has always been a thing of rumor, innuendo, and hushed theories. My mother was an American exchange student in CDMX starting in 1959/60, she eventually stayed there and finished college and married my father whose family 3rd generation or so Mexicans via British/Scotch/French expat status.
My mother related to me that during the late 50's and 60's CDMX, especially after the Cuban revolution, was a hotbed of international intrigue between the USSR/Cuba and the US. At the time there were quite a few American expats working and going to school down there and it was common to run into "people" in the community that seemed to dig into the personal side of things of that community. She also said that it was common for Russian or other eastern European folks to be around in social circles and there were lot of idealistic "societies" & "movements" and such led by what they termed beatnik folks.
Twice my mother was summoned to the US embassy on pretenses of "registering" or whatever it is that an American did when living abroad in those times and both times lots of questions were posed to her that were deeper than just an embassy concern type deal. In her student and then early adulthood circle of friends there was lots of pointing out of or speculation of CIA agents trying to fit in and mingle and also of people on the other side. My point in all of this is that the American government, the CIA in particular had a very active and wide spread presence in CDMX at this time.
In addition to the above the CIA had "assisted" the Mexicans in forming the "DFS", the MexGov Security Agency, and at the time had a litany of informers/agents in the Mexican government, 3 future presidents and at the time of the JFK assassination one of their top assets, a president to be, was head of "Gobernacion" which at the time was a large all encompassing segment of the Mexican government with a ton of power and which controlled the "DFS". Basically in the "spy vs. spy" of the 1960's the CIA ran the Mexican intelligence agency.
Now, here is LHO who manages to ride a bus from Nuevo Laredo to CDMX with no trouble at all, easy peasy. Something both my mother and father say was a risky big, biscuit eating, beetch to do in the 1960's and which was fraught with peril for a non Spanish speaking gringo for sure, most of the expats at that time either flew, rode the train, or drove, but no bus.
LHO is able to spend a few days in CDMX and calls on the Soviet embassy and Cuban consulate and meets and speaks with known commie agents. No problem at all. And he does all of this at a time when the "DFS" has extensive surveillance on all things commie in CDMX as well as having paid assets in both locations and both the "DFS" and the CIA have phone taps for both locations. His phone calls are recorded, but alas they are erased. The "DFS" was quick to pick up and interrogate and question possible foreign subversives or just questionable people, the agency scrutinized permanent visas and work permits in a big way, again my mother recounted the hassles of getting papers to live and work in CDMX.
And LHO just meanders down there knocks on commie doors, seeks visas, and catches a bullfight or two? Further he then proceeds to just return on home with no issues, apparently no problem crossing back into the US, even though the CIA and FBI had files on him. No worries at all.
What did he really do down there and how was he able to avoid immediate "DFS" scrutiny and obviously CIA scrutiny? LHO was able to do something that experienced residents were fearful of doing and not have any consequence whatsoever in doing so. How did that happen?
To me this segment of LHO is/was minimized and downplayed as nothing much, but when it is looked at it is yet again a glaring part of something so spectacularly coincidental that it is hard to fathom
A good summary of LHO in CDMX
https://www.pbs.org/wgbh/frontline/article/oswald-the-cia-and-mexico-city/ 
