What is the exclusionary rule?

• A. It allows evidence obtained with a search warrant to be kept out.
• B. It bars the use of illegally obtained evidence at trial.
• C. It prohibits presenting any physical evidence in court.
• D. It requires the police to exclude suspects based on discretion.

Answer: (B)

Evidence obtained in violation of a person’s Fourth Amendment rights cannot be used at trial due to the exclusionary rule. This rule acts as a suppression remedy to deter police from engaging in unlawful searches and seizures. When the police collect evidence illegally, that evidence is typically suppressed and cannot be admitted to prove guilt, though there are exceptions like the good-faith reliance on a defective warrant or evidence that would have been discovered by independent, lawful means. This is why the correct idea is that the rule bars the use of illegally obtained evidence at trial. It does not mean that evidence found with a valid warrant is automatically excluded, and it isn’t about forcing police to exclude suspects based on discretion.