The Army averred that no documents were missing and its own investigation had found no evidence of a spy ring, maintaining that what the defecting scientist had seen had probably been Signal Corp data that had been shared with the Russians during the War under Lend Lease. Still, the investigation went on. When electrical engineer Carl Greenblum, whose mother had died two days before, broke down and wept during Roy Cohn’s cross-examination and had to be led, visibly upset, from the closed door session, McCarthy announced to the press that “I have just received word that the witness admits he was lying the first time and now wants to tell the truth.” Greenblum’s name was leaked to the press and he and his family were harassed, a hammer and sickle painted on the door of their home. Greenblum explained that after he’d broken down he’d “sent word that I wanted to go back and tell my story from the beginning. That may have been interpreted to mean I was lying but that certainly was not the case.” Greenblum was fired from his job, but reinstated in 1958. <ref>”McCarthy Hearings, Volume 3, files.findlaw.com/news.findlaw.com/hdocs/docs/mccarthy/hearingsvol3.pdf."</ref>
[[Leonard Mins]], formerly of the [[Office of Strategic Services]] who was later idenitified in Venona decrypts as being a Soviet operative also testified at the hearings. <ref>*[http://www.senate.gov/artandhistory/history/resources/pdf/Volume3.pdf Army Signal Corps—Subversion and Espionage, October 22] (PDF). Executive Sessions Of The Senate Permanent Subcommittee On Investigations Of The Committee On Government Operations; Vol. 3. pgs. 2717-2726, U.S. Government Printing Office (1953)., Haynes & Klehr. Venona: Decoding Soviet Espionage in America. ISBN 0-300-08462-5. )<ref>
The fifteen hearings resulted in no indictments of any individuals, and established only that a few Communists had worked at Fort Monmouth from 1941 to 1947 – something that was already known by the Army -- and there had been a small communist cell at one of their subcontractors in Nutley New Jersey. There was no substantive evidence to connect these groups or individuals to espionage. <ref> “McCarthy Hearings 1952-54, Vol 1.</ref>