by John Marshall Harlan, Crowley v. United States — Opinion of the Court
“ A prisoner who is in court, and against whom an indictment is about to be preferred, may undoubtedly challenge for cause; this is not questioned. But the grand jury may find an indictment against a person who is not in court; how is he to avail himself of a defective organization of the grand jury? If he cannot do it by plea, he cannot do it in any way; and the law works unequally by allowing one class of persons to object to the competency of the grand jury, whilst another class has no such privilege. ”
