What type of evidence might be excluded from a court based on the exclusionary rule?

The exclusionary rule is a legal principle that prohibits the use of evidence in court that has been obtained in violation of a defendant's constitutional rights. When evidence is gathered through illegal means, such as without a valid search warrant or through unlawful interrogation techniques, it can be deemed inadmissible in court. This rule is designed to deter law enforcement from conducting unlawful searches and seizures, thereby upholding the integrity of the judicial process and protecting individual rights. In this context, evidence obtained unlawfully is excluded to ensure that the legal system does not reward or enable unconstitutional actions.

The other types of evidence mentioned, such as those gathered with a warrant, circumstantial evidence, or eyewitness testimonies, do not inherently face exclusion under the exclusionary rule, provided they were obtained through lawful means.