Given the following context:

Operation Kugown was the name given to the psychological warfare operation that had played an important part in the overthrow of Árbenz. During the coup, its primary targets had been the Árbenz government. After the conclusion of the coup, Kugown continued, targeting the rest of Guatemala, and the wider international audience. The aim of the operation was to disseminate derogatory information about Árbenz, and to convince Guatemalans—and the rest of the world—that Árbenz's regime had been communist-dominated. The use of documents from PBHistory for Operation Kugown began in August 1954. The standard method employed by the CIA was to select a document that could be portrayed as incriminating and write an explanation covering it. This would then be released to the press by the Comité, so that the local agency could receive some credit. The Comité also released a short documentary film, titled Despues Descubrimos La Verdad ("Later We Discover the Truth"). Through these avenues news media in Guatemala and elsewhere in Central America were saturated with stories of how the Árbenz government had been controlled by communists.While the press releases had a substantial impact within Guatemala, the CIA was unable to staunch the continued criticism of the US role in the coup, which came from virtually all countries except for West Germany and the US itself. Very few news agencies chose to run the press releases from the Comité, even though a number of them were put out. Information was sent to press agencies worldwide describing infiltration by the PGT and links among Communists elsewhere; nonetheless, their impact remained minimal. The lack of attention frustrated the PBHistory agents to the point where they planned to stage a false flag attack on their own headquarters, which would later be described as the work of Guatemala's remaining communists. However, the CIA decided that such an attack would need the cooperation of too many "indigenous" people, and the plan was scrapped as being too risky. Operation Kugown...

answer the following question:

What was the full name of the person who was convinced that there must have been a connection between Árbenz and the Soviet government? 

Donald Grant,