In the 1961 case Hill v. United States, the Supreme Court ruled that a defendant's right to counsel was not violated when he pleaded guilty without his lawyer present. The court held that since there was no constitutional requirement for a defendant to be represented by counsel during plea negotiations, Mr. Hill’s rights were not infringed upon when he entered his guilty plea without an attorney present. This decision came before later rulings which expanded defendants' Sixth Amendment rights and required legal representation at all critical stages of criminal proceedings, including pleas.

In the dissenting opinion for Hill v. United States, Justice Frankfurter disagreed with the majority's decision to reverse and remand the case back to lower courts. He argued that there was no violation of Rule 32(a) of Federal Rules of Criminal Procedure as claimed by petitioner because he had been given ample opportunity to speak before his sentencing. The justice also pointed out that even if a technical violation did occur, it should not automatically result in reversal unless it resulted in prejudice against the defendant - which wasn't proven here. Furthermore, he believed that such an interpretation would lead to unnecessary retrials and appeals based on minor procedural errors rather than substantive issues affecting guilt or innocence.