Planning for assassination included budgeting, training programs, creation of hit teams, drafting of target lists of persons, and transfer of armaments. The CIA history states that "until the day that Arbenz resigned in June 1954 the option of assassination was still being considered."
According to the official history, the assassination plans were never implemented. But names of the targeted individuals were deleted when the documents were made public, making it impossible to verify that none of them were killed during or in the aftermath of the coup.
In the 1970s, revelations about CIA assassination plots led to strict prohibitions against U.S.-sponsored assassinations.
I found this report on the web, but a few days later discovered that it had been deleted. Why was is deleted? Did the CIA order that it be taken down? I do not ever remember what keys I hit to find this report, but I do know that where it was before, it is not there now. Has it survived anywhere but on my hard drive? Does anybody know? Anyway, here is the complete "CIA Study of Assassination".