In fact, Alberto Rodriguez Gallego had been in Madrid since 1972, with the CIA complaining that he might be a "double agent" To my knowledge, nobody's ever conducted a full-on interview of Alberto Rodriguez Gallego. Why did the CIA distrust their own operatives immediately after Oswald's visit to Mexico?
Gallego has been questioned before, as had most of the CIA's surveillance operatives who were in contact with Oswald - but this questioning took place before JFK's assassination.
In studying the recently released records, I found previously unreported lie detector tests conducted not just on Gallego, but on the two CIA agents that ran the much bigger intelligence operation on the Soviet embassy; technical support on the embassy watch (LIMUST) the mobile surveillance team that followed Oswald (LIEMBRACE); most of the members of the airport surveillance operation of Cuban travelers (LIFIRE) and the intelligence operation at the university (LIMOTOR). They even polygraphed the political operative that supported people stuck in the city for weeks trying to get a Cuban visa (AMSUPER-1) and the political operatives in the city of Monterrey where Oswald's bus stopped overnight (LIVALVE-1 and others). All of these lie detector tests were conducted in the two weeks immediately after Oswald's departure. Except for possibly the Mexican students - a story that is a story in itself - I see no indication that polygraphs were scheduled for any of these operatives, nor that they had been polygraphed for years before Oswald's visit. What happened during Oswald's visit to trigger all this distrust among the CIA's most trusted operatives?
There is one final new story I need to tell about the Mexican CIA station - this one goes back to the first months of 1963 and illustrates the nasty nature of CIA business.
The Guatemalan Coup of March 1963 During 1963, on orders from headquarters, station chief Win Scott conducted a self-described harassment campaign against the former President of Guatelmala, Juan Jose Arevalo. This harassment included mailing "poisoned" candy to Arevalo's family (which included five children) as he campaigned for a second chance to serve as president while in exile in Mexico City.
These documents also reveal that the CIA staged a scenario designed to make Arevalo believe that the Cubans at the embassy were planning to bomb him. The Cuban government was allied with the Guatemalan dissidents, and this was an effort to split Arevalo from other dissidents.
There was even a faked "montage" photo of Arevalo standing with a Soviet military attache that was released to the Guatemalan newspapers during this shortened campaign, which ended abruptly with a military coup before the election.
This military coup plunged Guatemala deeper into more than thirty years of terrible civil war that claimed 200,000 lives. After the Guatemalan coup, Arevalo finally left Mexico for good the day after the Kennedy assassination, with the CIA monitoring his movements very closely during those final two months.

