John Garrett Underhill Jr.

In the report it was noted how Garrett Underhill was a writer and editor, and served for 3 1/2 years on the War Department General Staff.

It noted how he "is owner of a large private collection of Soviet small arms, acquired during a fifteen-year interest in foreign armaments.

[10] Following World War II, Underhill volunteered and served as Deputy Director for the Civil Defense of Washington, D.C. An exercise meant to simulate an evacuation in the event of a hydrogen bomb attack called "Operation Alert" was carried out in 1955.

Samuel Spencer, one of the commissioners who govern the District of Columbia, upon hearing Underhill's criticism ordered his dismissal just as "Operation Alert" began.

In an interview that Garrison gave for Playboy magazine, he referred to a CIA agent with valuable information pertaining to his investigation.

He served with the Military Intelligence Service from 6 July 1943 to May 1946 as an expert in photography, enemy weapons, and related technical specialities.

[14] Prior to Garrison being able to meet and interview Underhill, he was found in bed with a bullet wound behind his left ear on May 8, 1964.

[15] Sources differ on whether the cause of his death was suicide[16] or if people or groups had motivations to see him removed because he had secret information that he threatened to divulge.