John Marshall Harlan II,
Halliday v. United States (394 U.S. 831…
“ I agree with the court below that the absence of an explicit inquiry may sometimes entitle the defendant to a subsequent hearing, pursuant to 28 U.S.C. § 2255, to determine whether the plea was in fact made voluntarily and understandingly. In view of the wholly inexplicit directives of the old rule, however, I believe that such a hearing suffices, and that a plea made under that rule should not automatically be set aside as in the case of a plea made under the 1966 rule-the situation in McCarthy. ”
