Also known as:articulable suspicions · reasonable suspicion
Written by attorneys — see sources below.
A quantum of suspicion authorizing a limited investigatory detention when supported by specific and particularized facts indicating criminal activity. The standard falls short of probable cause but requires more than a mere hunch.
See Our Sources
How its tested
Common Examples
6
Anonymous Tip Predicts Movements
Aaron Adams receives an anonymous call describing a suspect who will exit a building at a precise time, enter a specific vehicle, and drive to a known drug location. Officers observe the predicted conduct unfold exactly as described. They detain the suspect briefly to investigate further.
Brief Luggage Detention
Alan Ackerman's suitcase draws attention at an airport due to nervous behavior and a short turnaround itinerary. Officers detain the bag for a narcotics dog sniff lasting under thirty minutes. The limited hold allows verification without prolonged interference.
Andre Antoine arrives on a cash one-way ticket from a source city, appears nervous, and carries little luggage. Officers note these details alongside his arrival time and route. The combination supports a brief stop to ask questions.
Vehicle Area Search
Anthony Arnold is stopped for a traffic violation and appears agitated near the passenger compartment. Officers see a knife on the seat and conduct a limited search of the area within reach. The intrusion stays confined to officer safety concerns.
Michigan v. Long463 U.S. 1032 (1983)
In a rural area of Michigan one evening shortly after midnight, Deputies Howell and Lewis observed a car traveling erratically and at excessive speed. The officers observed the car turning down a side road, where it swerved off into a shallow ditch. The officers stopped to investigate. Long, the only occupant of the automobile, met the deputies at the rear of the car, which was protruding from the ditch onto the road. The door on the driver's side of the vehicle was left open.
Deputy Howell requested Long to produce his operator's license, but he did not respond. After the request was repeated, Long produced his license. Long again failed to respond when Howell requested him to produce the vehicle registration. After another repeated request, Long, who Howell thought appeared to be under the influence of something, turned from the officers and began walking toward the open door of the vehicle. The officers followed Long and both observed a large hunting knife on the floorboard of the driver's side of the car. The officers then stopped Long's progress and subjected him to a Terry protective patdown, which revealed no weapons.
Long and Deputy Lewis then stood by the rear of the vehicle while Deputy Howell shined his flashlight into the interior of the vehicle, but did not actually enter it. The purpose of Howell's action was to search for other weapons. The officer noticed that something was protruding from under the armrest on the front seat. He knelt in the vehicle and lifted the armrest. He saw an open pouch on the front seat, and upon flashing his light on the pouch, determined that it contained what appeared to be marihuana. After Deputy Howell showed the pouch and its contents to Deputy Lewis, Long was arrested for possession of marihuana. A further search of the interior of the vehicle, including the glovebox, revealed neither more contraband nor the vehicle registration. The officers decided to impound the vehicle. Deputy Howell opened the trunk, which did not have a lock, and discovered inside it approximately 75 pounds of marihuana.
The Barry County Circuit Court denied Long's motion to suppress the marihuana taken from both the interior of the car and its trunk. He was subsequently convicted of possession of marihuana. The Michigan Court of Appeals affirmed Long's conviction, holding that the search of the passenger compartment was valid as a protective search under Terry. The Michigan Supreme Court reversed. The court held that the sole justification of the Terry search, protection of the police officers and others nearby, cannot justify the search in this case. The marihuana found in Long's trunk was considered by the court below to be the fruit of the illegal search of the interior, and was also suppressed.
The Supreme Court granted certiorari to consider the authority of a police officer to protect himself by conducting a Terry-type search of the passenger compartment of a motor vehicle during the lawful investigatory stop of the occupant of the vehicle.
Alexis Archer stands on a corner in a high-crime area and repeatedly approaches passing cars in a manner consistent with drug sales. Officers watch the pattern for several minutes before approaching. The observed conduct justifies a brief detention.
Terry v. Ohio392 U.S. 1, 88 S.Ct. 1868, 20 L.Ed.2d 889 (1968)
On October 31, 1963, Cleveland police detective Martin McFadden, a 39-year veteran assigned to downtown Cleveland for 30 years, observed John W. Terry and Richard Chilton standing on the corner of Huron Road and Euclid Avenue.
McFadden took up a post of observation 300 to 400 feet away. He watched as the two men walked back and forth along Huron Road, pausing repeatedly to look in the window of a store before conferring with each other. This pattern repeated roughly a dozen times over ten to twelve minutes.
A third man, Katz, joined them briefly before departing, after which Terry and Chilton followed the same path. By this time McFadden had become thoroughly suspicious that the men were casing the store for a robbery and feared they might be armed.
McFadden approached the three men in front of Zucker's store, identified himself as a police officer, and asked their names. When they mumbled responses, he grabbed Terry, spun him around, patted down the outer clothing of his overcoat, and felt a pistol in the left breast pocket.
He removed a .38-caliber revolver from Terry's pocket and ordered the men into the store, where he similarly frisked Chilton and discovered another revolver while finding no weapons on Katz. Terry and Chilton were arrested and charged with carrying concealed weapons.
Prior to trial they moved to suppress the revolvers as the product of an unlawful search. The trial court denied the motion after hearing McFadden's testimony, finding that the officer had reasonable cause to believe the defendants were acting suspiciously and that the frisk was necessary for his protection. After the denial, Terry and Chilton waived jury trial, were convicted, and sentenced to one to three years in the penitentiary. The Ohio Court of Appeals affirmed, the Supreme Court of Ohio dismissed the appeal, and the United States Supreme Court granted certiorari.
Albert Allen walks repeatedly past the same block late at night without apparent purpose. Officers request identification during the encounter. Refusal alone does not extend the stop beyond the initial justification.
Kolender v. Lawson461 U.S. 352, 103 S.Ct. 1855, 75 L.Ed.2d 903 (1983)
Edward Lawson was detained or arrested on approximately fifteen occasions by San Diego police officers between March 1975 and January 1977 while walking on the streets of the city. On each occasion, officers stopped Lawson and requested that he produce a driver's license or other identification. When he was unable to comply, the officers arrested him under California Penal Code section 647(e). Lawson was prosecuted twice under the statute and convicted once. The second charge was dismissed.
Lawson filed a civil action in the United States District Court for the Southern District of California against various officers and officials, including Deputy Chief Commander H. A. Porazzo of the California Highway Patrol. The complaint sought a declaratory judgment that section 647(e) was unconstitutional, a mandatory injunction restraining its enforcement, and compensatory and punitive damages. The District Court held the statute overbroad, enjoined its enforcement, and denied damages on the ground that the officers had acted in good faith.
The Court of Appeals for the Ninth Circuit affirmed the District Court's determination that the statute was unconstitutional. It concluded that the statute violated the Fourth Amendment, contained a vague enforcement standard susceptible to arbitrary enforcement, and failed to give fair notice of the conduct prohibited. The Ninth Circuit also reversed the denial of a jury trial on the damages issue and remanded the case for trial. The officers appealed to the Supreme Court from the portion of the judgment declaring the statute unconstitutional and enjoining its enforcement. The Supreme Court noted probable jurisdiction.
California Penal Code section 647(e) (West 1970) provides that every person who loiters or wanders upon the streets or from place to place without apparent reason or business is guilty of disorderly conduct, a misdemeanor. The statute further requires that such a person refuse to identify himself and to account for his presence when requested by any peace officer if the surrounding circumstances indicate to a reasonable man that the public safety demands such identification. California courts have construed the statute to require that a detained person provide credible and reliable identification. This identification must carry reasonable assurance that it is authentic and provide means for later contact with the person who has identified himself.
The District Court made no specific findings concerning the circumstances of each stop, but the trial transcript contains descriptions given by both Lawson and the officers. One officer testified that he stopped Lawson on an otherwise vacant street late at night because the area was isolated and near a high-crime zone. Another testified that he detained Lawson while walking at a late hour in a business area where burglaries had occurred. Lawson stated that he had never been stopped by police for any reason apart from these detentions under the statute.
What level of suspicion does articulable suspicion require compared to probable cause?
Articulable suspicion demands specific facts indicating criminal activity but falls short of the fair probability required for probable cause. It authorizes only brief detentions rather than arrests or full searches.
Can an anonymous tip alone establish articulable suspicion?
An anonymous tip supports articulable suspicion only when it carries sufficient indicia of reliability, such as accurate predictions of future conduct that demonstrate inside knowledge.
How does the totality of the circumstances test apply to articulable suspicion?
Innocuous factors such as travel patterns, payment methods, and demeanor may collectively create articulable suspicion even if no single factor would suffice on its own.
Does articulable suspicion permit detention of personal property?
Officers may briefly detain luggage or other effects on articulable suspicion of contraband, provided the detention remains limited in scope and duration.
What role does officer experience play in forming articulable suspicion?
Officers may draw on specialized training to interpret observed conduct that would appear innocent to a layperson, provided the inference remains objectively reasonable under the totality of circumstances.
reasonable
. If the State of Ohio were to provide that police officers could, on
articulable suspicion
less than probable cause, forcibly frisk and disarm persons thought to be carrying concealed weapons, I would have little doubt that action taken pursuant to such authority could be…