In the 1960 case of Lurk v. United States, the Supreme Court examined whether a defendant's constitutional rights were violated when they were not present during a conference between their lawyer and the judge. The petitioner, Lurk, was convicted for bank robbery in Missouri but argued that his absence from an off-the-record discussion about jury instructions infringed upon his right to be present at every stage of trial as guaranteed by Rule 43 of Federal Rules of Criminal Procedure and Constitution’s Fifth Amendment Due Process Clause. The Supreme Court held that Lurk's rights had not been violated because he failed to demonstrate how his presence could have contributed to ensuring fairness or reliability in this part of proceedings. The court reasoned that discussions on legal matters such as jury instructions are typically beyond comprehension for laypersons like defendants without legal training; hence their participation would likely be insignificant. Therefore, it concluded that a defendant does not need to be present during conferences solely concerning points of law.

In the dissenting opinion for Lurk v. United States, it was argued that the majority's decision to uphold a conviction based on evidence obtained through an unlawful search and seizure violated the Fourth Amendment rights of the defendant. The dissenting justices believed that this ruling set a dangerous precedent by allowing law enforcement officers to disregard constitutional protections against unreasonable searches and seizures in their pursuit of criminal convictions. They contended that such actions undermine public trust in law enforcement agencies and erode civil liberties. Furthermore, they asserted that excluding illegally obtained evidence from court proceedings is essential to maintaining judicial integrity and ensuring fair trials for all defendants.