What is the Exclusionary Rule?

• A. It requires suppression of evidence obtained in violation of the Fourth Amendment
• B. It requires suppression in all cases
• C. It applies only to state cases
• D. It has no impact on criminal prosecutions

Answer: (A)

The Exclusionary Rule bars using evidence that was obtained through an unlawful search or seizure, so it cannot be used to convict someone. This rule exists to deter police from violating the Fourth Amendment’s protections against unreasonable searches and seizures. Although it started as a federal-only rule, the Supreme Court extended the protection to state prosecutions through the Fourteenth Amendment, so both federal and state cases generally follow it. In practice, if evidence is gathered in a way that breaches the Fourth Amendment, it is typically suppressed at trial and cannot be relied on to prove guilt. There are limited exceptions, like the good-faith exception, independent source doctrine, inevitable discovery, or attenuation, where tainted evidence might still be admitted, but those are specific circumstances. The core idea is that evidence found through illegal means is excluded to uphold constitutional rights and encourage lawful policing.