
The stop and frisk rule was established by the Supreme Court in the 1968 case Terry v. Ohio, which set a precedent for balancing police investigative authority with individual rights under the Fourth Amendment, which prohibits unreasonable search and seizure. The ruling states that a police officer may stop and frisk a suspect without probable cause to arrest if they have a reasonable suspicion that a crime has been, is being, or is about to be committed, and the suspect may be armed and dangerous. The term reasonable suspicion was not explicitly defined, leading to criticism of stop and frisk policies for their potential to encourage racial profiling.
| Characteristics | Values |
|---|---|
| Case name | Terry v. Ohio |
| Year | 1968 |
| Court | U.S. Supreme Court |
| Amendment | Fourth Amendment |
| Police action | Stop and frisk |
| Reasonable suspicion | Yes, required for police action |
| Probable cause | Not required for police action |
| Warrant | Not required for police action |
| Search type | Limited search or "pat down" of outer clothing |
| Search purpose | To investigate suspected crime and ensure safety |
| Racial profiling concerns | Yes, particularly in urban areas |
| Subsequent rulings | Floyd v. City of New York (2011), Rodriguez v. United States (2015) |
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What You'll Learn

Terry v. Ohio (1968)
On October 31, 1963, Cleveland Police detective Martin McFadden, with 39 years of experience, noticed three men acting suspiciously in front of a jewelry store on Euclid Avenue. The men, John W. Terry, Richard Chilton, and Katz, were pacing and taking turns to look into the store window. McFadden suspected them of "casing a job, a stick-up" and approached them, identifying himself as a police officer. When the men mumbled something in response to his question about their names, McFadden proceeded to pat down their outer clothing and found a pistol in Terry's overcoat pocket and a revolver in Chilton's coat pocket. McFadden arrested and charged Terry and Chilton with carrying concealed weapons.
The case, known as Terry v. Ohio (1968), became a landmark decision by the United States Supreme Court, setting a precedent for "stop and frisk" laws. The Court affirmed the conviction, ruling that police officers can interrogate and frisk suspicious individuals without probable cause for an arrest, as long as the officer can articulate a reasonable basis for the action. This basis, in this case, was the officer's safety, as he reasonably believed that the men might be armed and posed a threat to his safety.
The Court distinguished between an investigatory "stop" and an arrest, and between a frisk of the outer clothing for weapons and a full-blown search for evidence. The "stop and frisk" was deemed reasonable as it was minimally invasive and essential for the officer's safety and investigative duties. The Court held that a loaded pistol discovered during the frisk is admissible as evidence.
The decision in Terry v. Ohio highlights the clash between Fourth Amendment protections from intrusive police conduct and an officer's duty to investigate and prevent crime. While it allows for stop and frisk without probable cause, it does not provide blanket authority to intrude on an individual's right to be left alone. The Court recognized the potential for abuse, especially regarding minorities and the poor, and emphasized that stop and frisk must be based on reasonable suspicion, good cause, and articulable suspicion.
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Reasonable suspicion
The "stop and frisk" rule was established following the 1968 Supreme Court case of Terry v. Ohio, which set a legal precedent for balancing police investigative authority with individual rights under the Fourth Amendment. The Fourth Amendment prohibits unreasonable search and seizure by police without a warrant.
The ruling in Terry v. Ohio states that a police officer may stop and frisk a suspect on the street without probable cause to arrest if they have a reasonable suspicion that the person has committed, is committing, or is about to commit a crime, and has a reasonable belief that the suspect may be armed and dangerous. The Court in Terry v. Ohio held that a stop-and-frisk must comply with the Fourth Amendment, meaning that the stop-and-frisk cannot be unreasonable. According to the Terry Court, a reasonable stop-and-frisk is one:
> "in which a reasonably prudent officer is warranted in the circumstances of a given case in believing that his safety or that of others is endangered, he may make a reasonable search for weapons of the person believed by him to be armed and dangerous."
The term "reasonable suspicion" was not explicitly defined by the Court, leaving some ambiguity in its application. This ambiguity has resulted in criticism of stop-and-frisk policies, particularly those implemented by urban police departments, for their potential to encourage racial profiling. In 2013, a federal judge ruled that the New York City police's stop-and-frisk practices were unconstitutional, highlighting concerns about discriminatory enforcement.
In Rodriguez v. United States (2015), the Supreme Court held that a police stop exceeding the time needed to address the issue for which the stop was made violates the Constitution's protection against unreasonable seizures. The Court ruled that a sniff search conducted by a police dog after the officer had completed their search violated the Fourth Amendment as it prolonged the stop beyond what was reasonably required.
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Search and seizure
The "stop and frisk" rule was established by the Supreme Court in the 1968 case of Terry v. Ohio. The ruling set a precedent for balancing police investigative authority with individual rights under the Fourth Amendment, which prohibits unreasonable search and seizure.
In the case, the Supreme Court held that a police officer may stop and frisk a suspect on the street without probable cause to arrest if they have a reasonable suspicion that a crime has been, is being, or is about to be committed, and the officer has a reasonable belief that the suspect may be armed and dangerous. This type of search is often referred to as a "Terry Stop".
The Court in Terry v. Ohio recognised that stops and frisks are significantly less intrusive than full-blown searches and seizures. The Court also did not explicitly define "reasonable suspicion", leaving some ambiguity in its application. This has led to criticism of stop and frisk policies, particularly those implemented by urban police departments, for their potential to encourage racial profiling.
In 2013, a federal judge ruled that the New York City Police's stop and frisk practices were unconstitutional, highlighting concerns about discriminatory enforcement. Similarly, in Floyd v. City of New York (2011), the Court held that the New York stop-and-frisk policy violated the Fourth Amendment as it resulted in more frequent stop and frisks for Black and Hispanic individuals.
In Rodriguez v. United States (2015), the Supreme Court further clarified the limitations of stop and frisk. The Court held that a police stop exceeding the time needed to address the initial reason for the stop violates the Constitution's protection against unreasonable seizures. In this case, a police dog performed a dog sniff search after the officer had completed the Terry Stop, and the Court ruled that this prolonged the stop beyond what was reasonably required, thus violating the Fourth Amendment.
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Officer safety
The "stop and frisk" rule, established in the 1968 case of Terry v. Ohio, allows police officers to briefly detain a person for questioning if they have a reasonable suspicion of illegal activity. This practice permits officers to conduct a limited search or "pat down" of the suspect's outer clothing for weapons to ensure officer safety.
The Supreme Court's ruling in Terry v. Ohio set a precedent for balancing police investigative powers with individual rights under the Fourth Amendment, which protects citizens against unreasonable searches and seizures. The Court held that a stop-and-frisk must comply with the Fourth Amendment and be based on more than whimsy but less than probable cause. Specifically, the Court outlined three requirements for a lawful stop and frisk:
- Reasonable suspicion: Officers must have a reasonable suspicion that a crime has been, is being, or is about to be committed by the suspect.
- Articulable suspicion: Officers must be able to articulate their suspicion of criminal activity, which can include specific behaviours or circumstances observed.
- Reasonable belief: Officers must have a reasonable belief that the suspect may be armed and dangerous to themselves or others.
In Terry v. Ohio, the Court ruled in favour of the police officer's actions, stating that it was reasonable for the officer to believe that Terry and his companions were armed and posed a threat to the officer's safety. This decision established the principle that officer safety is a critical factor in justifying a stop and frisk.
However, it is important to note that the term "reasonable suspicion" was not explicitly defined by the Court, leading to some ambiguity in its application. As a result, stop and frisk policies, particularly those of urban police departments, have faced significant criticism for their potential to encourage racial profiling and discriminatory enforcement. Despite this ongoing debate, the Supreme Court has not heard another case challenging stop and frisk laws since Terry v. Ohio.
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Racial profiling
The "stop and frisk" rule was established following the 1968 case of Terry v. Ohio, which set a precedent for balancing police investigative authority with individual rights under the Fourth Amendment. The Fourth Amendment protects citizens from unreasonable searches and seizures, requiring that police have a reasonable suspicion that a crime has been, is being, or is about to be committed before stopping a suspect.
In the case of Terry v. Ohio, the Supreme Court ruled that a police officer may stop and frisk an individual without probable cause for arrest if they have a reasonable suspicion that the person has committed or is about to commit a crime and a reasonable belief that they may be armed and dangerous. The Court did not explicitly define "reasonable suspicion," leaving some ambiguity in its application.
In recent decades, stop and frisk policies have faced significant criticism, particularly those implemented by urban police departments, due to their potential to encourage racial profiling. In 2011, in Floyd v. City of New York, a court held that the New York stop-and-frisk policy violated the Fourth Amendment as it resulted in more frequent stops and frisks of Black and Hispanic individuals.
Then, in 2013, a federal judge ruled that the stop-and-frisk practices of the New York City Police Department were unconstitutional, citing concerns about discriminatory enforcement. This ruling highlighted broader issues surrounding law enforcement practices, civil liberties, and community trust, making stop and frisk a significant topic in discussions about policing in the United States.
The lack of clarity around "reasonable suspicion" has likely contributed to the inconsistent application of stop and frisk and its potential for racial profiling. The ongoing debate reflects a need for clearer guidelines to ensure that stop and frisk is applied fairly and impartially, without discriminating against individuals based on race or ethnicity.
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Frequently asked questions
The "stop and frisk" rule allows police officers to briefly detain a person for questioning if they have a reasonable suspicion of illegal activity. Officers can then conduct a limited search or "pat down" of the suspect's clothing for weapons to ensure safety.
The "stop and frisk" rule was established by the Supreme Court in the 1968 case Terry v. Ohio.
In Terry v. Ohio, the Supreme Court ruled that police officers can stop and frisk individuals without violating the Fourth Amendment's prohibition on unreasonable searches and seizures if they have a reasonable suspicion that the person has committed, is committing, or is about to commit a crime, and they have a reasonable belief that the person may be armed and dangerous.














