U.S. v. Leon

In U.S. v. Leon (1984), the Supreme Court addressed whether evidence obtained through a police warrant later found to be faulty could still be used in court. The Court ruled that if police acted in good faith—meaning they genuinely believed the warrant was valid—they could use the evidence despite later discovering mistakes. This decision established the "good faith exception," balancing law enforcement's interests with protecting individuals' constitutional rights against unreasonable searches and seizures.