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MAY 3 1956, MAY 4 1956; ***** comes in the Graham murder case as Judge ***** McDonald, closely watched by defense attorney ***** Vigil (standing left) and defendant John Gilbert Graham, reads a statement signed by Graham declining to testify in his own behalf and requesting that his wife, Gloria, and a psychiatrist not be called as witnesses.; (Photo By Ira Gay Sealy/The Denver Post via Getty Images)

MAY 3 1956, MAY 4 1956; ***** comes in the Graham murder case as Judge ***** McDonald, closely watched by defense attorney ***** Vigil (standing left) and defendant John Gilbert Graham, reads a statement signed by Graham declining to testify in his own behalf and requesting that his wife, Gloria, and a psychiatrist not be called as witnesses.;  (Photo By Ira Gay Sealy/The Denver Post via Getty Images)

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Portrait of American founder and director of the Federal Bureau of Investigation J. Edgar Hoover (1895 - 1972), mid 20th century. (Photo by Photoquest/Getty Images)

Portrait of American founder and director of the Federal Bureau of Investigation J. Edgar Hoover (1895 - 1972), mid 20th century. (Photo by Photoquest/Getty Images)

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The Italian-American secretary of a law firm in Brooklyn writing up a document. New York, March 1956 (Photo by Mario De Biasi/Mondadori via Getty Images)

The Italian-American secretary of a law firm in Brooklyn writing up a document. New York, March 1956 (Photo by Mario De Biasi/Mondadori via Getty Images)

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circa 1955: Two members of a teenage street gang are taken into the 9th Precinct police station after their arrest in New York City. (Photo by Carl Purcell/Three Lions/Getty Images)

circa 1955:  Two members of a teenage street gang are taken into the 9th Precinct police station after their arrest in New York City.  (Photo by Carl Purcell/Three Lions/Getty Images)