What is the purpose of the exclusionary rule?

The purpose of the exclusionary rule is to discourage illegal searches and seizures. This rule is a legal principle established in the United States that prevents evidence obtained through violations of a person's Fourth Amendment rights from being used in a court of law. Essentially, it aims to deter law enforcement from conducting searches or seizures that do not comply with constitutional standards. By excluding evidence that has been improperly obtained, the rule encourages police and other law enforcement agencies to adhere to legal procedures and obtain warrants when required, thus protecting individuals' rights and upholding the rule of law.

The other options focus on concepts that do not align with the primary intent of the exclusionary rule. Promoting efficient investigations, ensuring more favorable trial outcomes, and assisting law enforcement in collecting evidence do not address the fundamental goal of protecting constitutional rights against unlawful government action.