Ruling in Mapp v. Ohio, on June 19, 1961, the majority opinion declared that “All evidence obtained by searches and seizures in violation of the Federal Constitution is inadmissible in a criminal trial in a state court.”
The question presented was:
“[W]hether the States are Constitutionally free to follow [the common-law non-exclusionary rule] or not as they may themselves determine.”
The opinion
Read the full rulingPDF · 1.19 MBPublished by the Library of Congress.
Oral argument
Listen at OyezOffsiteThe Court's own audio archive begins with the 2010 term, so this argument is held by Oyez rather than by supremecourt.gov.

