The exclusionary rule excludes any evidence obtained

In violation of the United States Constitution

Explanation:

The exclusionary rule prevents the government using evidence gathered in violation of the U. S. Constitution. It is done in order to prevent the defendant's constitutional rights.

The exclusionary rule is granted in the Fourth Amendment which protects citizens from unreasonable searches and seizures. Also, the Fifth Amendments protects the defendant from improperly elicited self-incriminatory statements and the Sixth grants the defendant the right to council.

There are several exceptions to the exclusionary rule, the most common one is in deportation hearings.