Also known as: articulable fact · articulable facts and circumstances · specific and articulable facts
Written by attorneys · grounded in primary & secondary sources — see below
Specific concrete observations that together with rational inferences supply an objective basis for reasonable suspicion or other Fourth Amendment standards justifying limited police intrusions such as investigative stops protective sweeps or frisks.
Officers arrested Albert Allen inside his apartment for assault. While securing the scene they heard movement in a closed bedroom closet and observed an open window suggesting a possible escape route. These observations supplied the specific facts needed to justify a limited sweep of areas where a person could hide.
Anika Anand lingered outside a closed bank for twenty minutes repeatedly stepping toward customers and patting her waistband. Officer Lane observed the pattern at a high-risk location just after closing. The concrete conduct justified a brief detention and outer-clothing patdown for weapons.
Select any source to read its text and confirm it supports the definition.
Alexandra Armstrong walked repeatedly along the same block at night without apparent purpose. Officers asked her to identify herself after noting the unusual pattern. The request rested on the observed conduct rather than a general demand for papers.
Andre Antoine was pulled over for speeding and appeared nervous while repeatedly glancing toward the passenger compartment. The officer saw a partially concealed object under the seat. These facts permitted a limited search of areas within the driver's immediate reach.
Ariana Azizi's suitcase emitted a strong chemical odor and she appeared agitated when questioned about her itinerary. Officers briefly detained the bag to arrange a dog sniff. The observed behavior and smell provided the basis for the limited seizure.
Alan Ackerman matched a description of a recent theft suspect and stood near the crime scene. Officers detained him briefly and asked his name to confirm identity. The request was a routine part of the investigation supported by the matching description.
Articulable facts are specific concrete observations that an officer can point to and that together with rational inferences support reasonable suspicion. A hunch is an unparticularized suspicion lacking any objective basis in observed conduct or circumstances.
Yes. Courts assess the totality of the circumstances and permit officers to aggregate several individually lawful factors when the combination gives rise to an objective basis to suspect criminal activity.
No. The standard requires only that the facts support a reasonable inference of criminal activity. Officers need not eliminate every possible lawful explanation before acting.
The same facts that support reasonable suspicion of criminal activity can also justify a limited frisk if they additionally indicate the person may be armed and dangerous.
…387 U. S. 523, 534-535, 536-537 (1967). And in justifying the particular intrusion the police officer must be able to point to specific and articulable facts which, taken together with rational inferences from those facts, reasonably warrant that intrusion. The scheme of the Fourth Amendment becomes meaningful only when it is assured that at…