On March 3, 1977 the FBI had  requested copies of all the Zodiac letters. Even in 11977 the bureau was still poking  around in the Zodiac case. The top psycholinguistics expert in the country, Dr. Murray S. Miron, working from nineteen of the killer's letters, came to these conclusions about Zodiac in a secret Syracuse Research Institute report: Zodiac " has had some exposure to our training in elementary cryptography" and " is a Caucasian unmarried male in his twenties. He is no more than high school educated, reads little, is isolated, withdrawn, and unrelated in his habits, quiet and unprepossessing in disposition" Miron felt the killer had good eyesight and was " a discretionary illiterate, " someone who prefers " the passiveness of pictures, T V, and the movies" and does not even have a library of " cheap pocket books." Zodiac, in Miron's opinion, "would have spent much time in movie houses specializing in sado-masochistic and occult eroticism" and was " a borderline psychotic... His communications display the characteristic signs of magical thinking, and narcissistic infantilism typical of the schizophrenic. "Zodiac rather well fits the pattern of what might be called pseudoreactive schizophrenia...Such individuals engage in their bizarre behavior as sort of a cover up for their underlying and more hidden psychosis. They can be expected to display wide swings of emotion from intense euphoria to deepest depression. "He lives the secret life of seclusion and presents to the world a mask of containment, pleasantness and ordinariness." Miron thought thee December 1969 letter to Melvin Belli contained hints of the depression that " frequently overtakes him... It is not unlikely thatn in one of those virulent depressions, such individuals could commit suicide." Because of  Zodiac's concern with control, Miron felt he would shun the "disinhibiting effects of alcohol," and would avoid norman sexual contacts with women."