Potter Stewart was an American lawyer and judge who served as an associate justice of the United States Supreme Court from 1958 to 1981. During his tenure, he made major contributions to criminal justice reform, civil rights, access to the courts, and Fourth Amendment jurisprudence.

The Fourth Amendment to the United States Constitution is part of the Bill of Rights. It prohibits unreasonable searches and seizures and sets requirements for issuing warrants: warrants must be issued by a judge or magistrate, justified by probable cause, supported by oath or affirmation, and must particularly describe the place to be searched and the persons or things to be seized.