Whether the Sixth Amendment permits a federal court to convict and imprison an accused person who has neither counsel nor a valid waiver of counsel.
Holding
No. In a federal criminal prosecution, assistance of counsel—or a competent and intelligent waiver of that assistance—is an essential prerequisite to a valid conviction that deprives the accused of liberty.
Reasoning
The Sixth Amendment's counsel guarantee is a fundamental protection against unjust deprivation of life or liberty. The Court stressed the practical reality that even an intelligent layperson ordinarily lacks the legal knowledge needed to assess an indictment, apply evidentiary rules, prepare a defense, examine witnesses, and navigate criminal procedure against a trained prosecutor.
For federal courts, the Sixth Amendment withdraws the power to impose a conviction and sentence unless the accused has counsel or has properly waived counsel. The right is therefore not merely a preference or a procedural formality; it is a constitutional condition on a federal court's authority to take a person's liberty.
The Court treated this rule as especially important where an indigent accused is brought to trial without a lawyer. A trial court must protect the right on its own initiative rather than assume that an unrepresented defendant can adequately safeguard it.