Tom C. Clark,
Watkins v. United States (354 U.S. 178…
“ In contempt prosecutions before a court, however, the majority places an investigative hearing on a par with a criminal trial, requiring that 'knowledge of the subject to which the interrogation is deemed pertinent * * * must be available (to the witness) with same degree of explicitness and clarity that the Due Process Clause requires in the expression of any element of a criminal offense.' I know of no such claim ever being made before. Such a requirement has never been thought applicable to investigations and is wholly out of place when related to the informing function of the Congress. ”
