Mapp v. Ohio
E15566
Mapp v. Ohio is a landmark 1961 U.S. Supreme Court case that applied the exclusionary rule to the states, holding that evidence obtained in violation of the Fourth Amendment cannot be used in state criminal prosecutions.
All labels observed (5)
How this entity was disambiguated
This entity first appeared as the object of triple T126052 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Mapp v. Ohio Context triple: [Fourteenth Amendment to the United States Constitution, keyCase, Mapp v. Ohio]
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A.
Miranda v. Arizona
Miranda v. Arizona is a landmark 1966 U.S. Supreme Court case that established the requirement for police to inform criminal suspects of their rights to remain silent and to have an attorney present during custodial interrogations.
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B.
Gideon v. Wainwright
Gideon v. Wainwright is a landmark 1963 U.S. Supreme Court decision that guaranteed the right to court-appointed counsel for criminal defendants who cannot afford an attorney.
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C.
Printz v. United States
Printz v. United States is a 1997 U.S. Supreme Court decision that limited federal power by holding that Congress cannot compel state or local officials to implement federal regulatory programs.
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D.
Katzenbach v. McClung
Katzenbach v. McClung is a 1964 U.S. Supreme Court case that upheld the federal government’s power to prohibit racial discrimination in local restaurants under the Civil Rights Act of 1964.
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E.
Reynolds v. United States
Reynolds v. United States is an 1879 U.S. Supreme Court case that established the distinction between protected religious belief and regulable religiously motivated conduct, holding that the Free Exercise Clause does not excuse individuals from compliance with otherwise valid criminal laws such as those banning polygamy.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Mapp v. Ohio Target entity description: Mapp v. Ohio is a landmark 1961 U.S. Supreme Court case that applied the exclusionary rule to the states, holding that evidence obtained in violation of the Fourth Amendment cannot be used in state criminal prosecutions.
-
A.
Miranda v. Arizona
Miranda v. Arizona is a landmark 1966 U.S. Supreme Court case that established the requirement for police to inform criminal suspects of their rights to remain silent and to have an attorney present during custodial interrogations.
-
B.
Gideon v. Wainwright
Gideon v. Wainwright is a landmark 1963 U.S. Supreme Court decision that guaranteed the right to court-appointed counsel for criminal defendants who cannot afford an attorney.
-
C.
Printz v. United States
Printz v. United States is a 1997 U.S. Supreme Court decision that limited federal power by holding that Congress cannot compel state or local officials to implement federal regulatory programs.
-
D.
Katzenbach v. McClung
Katzenbach v. McClung is a 1964 U.S. Supreme Court case that upheld the federal government’s power to prohibit racial discrimination in local restaurants under the Civil Rights Act of 1964.
-
E.
Reynolds v. United States
Reynolds v. United States is an 1879 U.S. Supreme Court case that established the distinction between protected religious belief and regulable religiously motivated conduct, holding that the Free Exercise Clause does not excuse individuals from compliance with otherwise valid criminal laws such as those banning polygamy.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Fourth Amendment case
ⓘ
United States Supreme Court case ⓘ criminal procedure case ⓘ landmark decision ⓘ |
| arguedDate | 1961-03-29 ⓘ |
| chiefJusticeAtDecision | Earl Warren ⓘ |
| citation | 367 U.S. 643 ⓘ |
| concurrenceBy |
Hugo L. Black
ⓘ
William O. Douglas ⓘ |
| constitutionalProvision |
Fourteenth Amendment to the United States Constitution
ⓘ
linked to:
Fourteenth Amendment
Fourth Amendment to the United States Constitution ⓘ |
| court | Supreme Court of the United States ⓘ |
| decisionDate | 1961-06-19 ⓘ |
| decisionType | majority decision ⓘ |
| dissentBy |
Byron R. White
ⓘ
Charles E. Whittaker ⓘ Felix Frankfurter ⓘ John M. Harlan II ⓘ |
| effect |
incorporated the exclusionary rule against the states
ⓘ
made illegally obtained evidence inadmissible in state courts ⓘ |
| fullName | Mapp v. Ohio ⓘ |
| holding |
Evidence obtained in violation of the Fourth Amendment is inadmissible in state criminal prosecutions
ⓘ
The exclusionary rule applies to the states through the Fourteenth Amendment ⓘ |
| joinedByInMajority |
Earl Warren
ⓘ
Hugo L. Black ⓘ Potter Stewart ⓘ William J. Brennan Jr. ⓘ William O. Douglas ⓘ |
| jurisdiction |
United States
ⓘ
linked to:
United States of America
|
| legalDoctrine | exclusionary rule ⓘ |
| majorityOpinionBy | Tom C. Clark ⓘ |
| overruledPrecedent | Wolf v. Colorado ⓘ |
| overruledPrecedentInPart |
Wolf v. Colorado, 338 U.S. 25 (1949)
ⓘ
linked to:
Wolf v. Colorado
|
| page | 643 ⓘ |
| petitioner | Dollree Mapp ⓘ |
| priorHistory |
State v. Mapp, 170 N.E.2d 387 (Ohio 1960)
ⓘ
linked to:
Mapp v. Ohio
|
| relatedAreaOfLaw |
United States constitutional law
ⓘ
criminal law ⓘ evidence law ⓘ |
| relatedCase |
Weeks v. United States
ⓘ
Wolf v. Colorado ⓘ |
| reporter | United States Reports ⓘ |
| respondent |
State of Ohio
ⓘ
linked to:
Ohio
|
| stateParty | Ohio ⓘ |
| topic |
criminal procedure
ⓘ
incorporation doctrine ⓘ search and seizure ⓘ |
| volume | 367 ⓘ |
| yearDecided | 1961 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Mapp v. Ohio Description of subject: Mapp v. Ohio is a landmark 1961 U.S. Supreme Court case that applied the exclusionary rule to the states, holding that evidence obtained in violation of the Fourth Amendment cannot be used in state criminal prosecutions.
Referenced by (18)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Fourteenth Amendment
linked to: Mapp v. Ohio
linked to: Mapp v. Ohio
linked to: Mapp v. Ohio
Weeks v. United States
→
overruledInPartBy
→
Mapp v. Ohio (to the extent Weeks limited the exclusionary rule to federal cases)
ⓘ
linked to: Mapp v. Ohio
subject linked to:
Weeks