Tom C. Clark,
United States v. Zucca — Dissent
“ There are no membership cards in the Party and have been none for more than a decade. If these evidential methods of proof-the testimony and identity of undercover agents-must be disclosed in an affidavit, the Government must choose between foregoing denaturalization cases and drying up its source of information before the proceeding can be brought. It is common knowledge among law enforcement officers that witnesses are affidavit-shy, particularly in cases involving subversion. Often, testimony can be obtained only in court with the aid of compulsory process. ”
