In the 1997 case Debra Faye Lewis v. United States, the Supreme Court ruled on an issue related to self-incrimination and immunity from prosecution. Lewis had been granted immunity in exchange for her testimony before a grand jury investigating drug trafficking charges against her boyfriend. However, she was later indicted based on evidence that was not derived directly from her immunized testimony but rather through independent means. The court held that the Fifth Amendment's protection against self-incrimination does not prevent use of evidence obtained independently of compelled testimonial statements under grant of immunity, even if such evidence indirectly led investigators to discover incriminating information about the person who received immunity.

In the dissenting opinion for Debra Faye Lewis v. United States, it was argued that the majority's decision to uphold a warrantless search based on an officer's mistaken belief about the law contradicted previous Supreme Court rulings and undermined Fourth Amendment protections against unreasonable searches and seizures. The dissent emphasized that allowing such mistakes of law to justify searches would create a dangerous precedent where officers could bypass constitutional safeguards simply by being ignorant or misinformed about legal requirements. It also pointed out inconsistencies in how different types of errors were treated under this ruling, with factual mistakes requiring reasonable belief but legal ones not held to any standard at all. Furthermore, it criticized the majority for failing to provide clear guidance on what constituted an "objectively reasonable" mistake of law, leaving too much room for subjective interpretation and potential abuse.