403 U.S. 573 (1971)
The case of United States v. Harris is a cornerstone in the discussion around Fourth Amendment rights concerning search and seizure in relation to drug possession.
Does an affidavit relying primarily on the statements of an informant provide sufficient probable cause to issue a search warrant under the Fourth Amendment?
The rule established in this case centered on the 'totality of the circumstances' approach. An affidavit can establish probable cause when it includes sufficient detail corroborating the informant's claims and demonstrates the informant’s reliability and basis of knowledge.
The Supreme Court held that the affidavit contained sufficient probable cause to issue a search warrant, even though much of it was informed by statements from an informant whose identity was not disclosed to Harris.
United States v. Harris is a critical decision that notably affects how probable cause is adjudicated, especially in narcotics cases. For law students, this case offers a practical understanding of how courts assess the sufficiency of informants' contributions in securing search warrants. It underscores the necessity of corroboration when informant testimony underpins probable cause, impacting both prosecutorial practices and defense strategies in criminal cases.