Seizures of persons and suspicionless searches

The Restraint Line: When a Terry Stop Becomes an Arrest

The line between a Terry stop and an arrest turns on the objective character of the restraint, not the officer’s label. A Terry stop is a temporary investigative detention supported by reasonable suspicion; an arrest is a custody-level seizure supported by probable cause.

Run the distinction in this order:

Was the person restrained? A forceful seizure or submission to a show of authority is not a consensual encounter.
Was the restraint a temporary investigative detention? Ask whether officers were briefly investigating suspected criminal activity rather than taking the person into custody. A Terry stop requires specific and articulable facts, plus rational inferences, creating reasonable suspicion that the person committed, is committing, or is about to commit a crime.
Was the stop reasonably limited? Its duration, location, movement, force, and questioning must remain reasonably related to the investigation and be diligently pursued. There is no fixed minute limit. A stop becomes an arrest when the restraint is materially more intrusive than the investigation reasonably requires.
If it was custody, was there probable cause? Probable cause must exist for an arrest when the arrest occurs. The officer need not use the word “arrest,” and an officer’s subjective intention does not control.

Handcuffs, drawn weapons, multiple officers, or placing a person on the ground do not automatically create an arrest. Those measures may be reasonably necessary during a dangerous investigation. The decisive question is whether the overall restraint was reasonably necessary for the temporary investigation and officer or public safety. By contrast, transporting a suspect to a police station ordinarily signals an arrest because it substantially changes the setting and degree of restraint.

A Terry stop and an arrest can occur in sequence. For example, an officer may briefly detain a suspect on reasonable suspicion, then arrest after new facts create probable cause. The initial stop must be valid when made, and the later arrest must independently satisfy probable cause. A prolonged stop cannot be justified merely by hoping probable cause will eventually appear.

A frisk is a separate and narrower inquiry. A lawful Terry stop does not itself authorize a full evidentiary search; a protective frisk requires the additional Terry concern that the person is armed and dangerous, and its ordinary purpose is finding weapons.

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Because this chapter is closed-book, memorize the two triggers, the scope limits, and the fact that a valid stop can later become an arrest.

The Suspicionless-Search Families: Purpose, Scope, and the Boundary Fact

A suspicionless search is not automatically valid because it occurs in a public place or involves government property. First identify the special administrative purpose that replaces individualized suspicion; then test whether the program is neutral, minimally discretionary, and limited to that purpose. If the real primary purpose is ordinary crime control, the exception generally fails.

Border searches. At an international border or its functional equivalent, routine searches of persons, luggage, and vehicles may ordinarily occur without a warrant, probable cause, or reasonable suspicion. The sovereign has a special interest in controlling entry and exit. A highly intrusive bodily search or unusually prolonged detention is not treated like a routine luggage inspection; it requires individualized justification and must remain reasonable.

Airport screening. Domestic airport screening is an administrative safety search, not simply a border search. A neutral system requiring passengers and carry-on items to undergo screening for weapons or explosives may be suspicionless. The search is justified by aviation safety, and entry into the secure area may be conditioned on submission to screening. A traveler who refuses may be denied access; refusal does not itself create consent to a broader police search. If officials use screening as a pretext for general criminal investigation, ordinary Fourth Amendment requirements return.

Inventory searches. An inventory search follows lawful impoundment of a vehicle or lawful booking of a person’s property. It is valid without individualized suspicion when conducted under standardized procedures for caretaking, protection of property, and officer safety. The search must follow the policy’s permitted scope; officers may not use “inventory” as a label for discretionary rummaging designed to find evidence. Opening a closed container depends on what the standardized policy authorizes. An unlawful impoundment defeats the vehicle-inventory justification.

Checkpoints. A fixed checkpoint may briefly stop vehicles without individualized suspicion when its primary purpose is a special public-safety or administrative objective, such as highway sobriety enforcement or immigration control. Neutral procedures must limit officer discretion. A checkpoint whose primary purpose is discovering ordinary criminal evidence, such as narcotics, is invalid even if every vehicle is stopped briefly and uniformly. A permissible checkpoint seizure does not automatically authorize a search of the vehicle; the search needs its own justification.

Government offices and employees. Government ownership does not eliminate an employee’s reasonable privacy in a desk, office, or file. Under the government-workplace administrative-search doctrine, an employer may search without a warrant when the search is work-related or investigates work-related misconduct, provided the search is reasonable at its inception and in scope. A search aimed at ordinary criminal evidence rather than workplace administration generally must satisfy the ordinary Fourth Amendment rules. Security screening of visitors or employees entering a government building may also be suspicionless when neutral, limited, and genuinely directed to building safety.

Public schools. School officials may search a student without a warrant or probable cause when there are reasonable grounds at the search’s inception to believe the search will uncover evidence that the student violated the law or a school rule. The scope must be reasonably related to the objective and must not be excessively intrusive in light of the student’s age, sex, and the nature of the suspected infraction. A specific report that a student has a small prohibited device can justify searching the student’s backpack and a small container capable of holding that device; it does not automatically justify an undifferentiated strip search.

Certain suspicionless student drug-testing programs are permitted under the special-needs doctrine, particularly for students participating in athletics or other voluntary extracurricular activities, when the program is minimally intrusive and directed to the school’s safety and disciplinary concerns. That does not authorize suspicionless searches of the entire student body merely to enforce general criminal law. A school official’s involvement does not automatically disappear because a police officer is present, but a police-directed search primarily designed to gather criminal evidence may require ordinary Fourth Amendment justification.

Search family	Why individualized suspicion is unnecessary	Scope and boundary fact
Border	Sovereign control over entry and exit	Routine inspection is broader than a highly intrusive bodily search
Airport screening	Aviation safety and secure-area protection	Neutral screening is different from a pretextual criminal investigation
Inventory	Caretaking after lawful impoundment or booking	Standardized policy, not officer discretion, controls the scope
Checkpoint	Special public-safety or administrative purpose	Crime-control purpose invalidates the checkpoint; a stop does not itself authorize a search
Government workplace	Work-related administration or workplace misconduct	Ordinary criminal investigation is not a workplace search
Public school	Reduced student privacy and school safety	Reasonable suspicion ordinarily governs; limited special-needs testing is the exception

Recurring errors are concrete classification mistakes:

Treating handcuffs during a dangerous roadside investigation as automatically an arrest ignores the totality of the restraint and its safety necessity.
Calling a domestic airport screening a consent search misses that neutral aviation screening may be suspicionless and administrative.
Assuming a valid sobriety checkpoint permits opening every trunk confuses a permissible seizure with a separate search.
Treating a government-owned desk as public property overlooks the employee’s workplace privacy and the work-related-purpose limit.
Assuming a principal may search every student because schools have reduced privacy ignores the reasonable-suspicion-at-inception rule.

The Two-Choice Fork: A School Search and a Checkpoint Search

A middle-school principal receives a specific report from a reliable student that Jordan hid a small vaping device in Jordan’s backpack. The principal searches the backpack and opens a small zippered pouch inside it; a school police officer is present but does not direct the search.
At a fixed sobriety checkpoint, every driver is briefly stopped under a neutral plan. A driver shows no signs of intoxication, but an officer orders the driver to open the trunk solely to look for drugs.

Practice

Which TWO statements are most accurate?

	(A) The principal’s search is invalid because a warrant or probable cause was required.	(B) The principal’s search is valid if the pouch was a reasonable place to find the suspected vaping device and the search was not excessively intrusive.	(C) The checkpoint is invalid because every vehicle stop required reasonable suspicion.	(D) The checkpoint stop may be valid, but the trunk search is invalid absent a separate justification.	(E) The police officer’s presence automatically converted the principal’s search into a police search requiring probable cause.	(F) The officer could search the trunk because a valid checkpoint permits suspicionless searches for evidence of any crime.
Your answers

The Final Three Forks: Classification and Suspicionless Search

Practice

An officer sees Lee leaving a store shortly after a reported burglary and receives specific information linking Lee’s clothing to the report. The officer blocks Lee’s path, asks brief questions for eight minutes, and does not handcuff or move Lee. After a witness identifies Lee, the officer says, “You are under arrest.” What is the best analysis?

At a domestic airport, every passenger and carry-on bag must pass through a magnetometer and an x-ray scanner before entering the secure gate area. The procedure is applied neutrally to screen for weapons and explosives, and a passenger who refuses is denied entry. Which statement is most accurate?

A city establishes a fixed checkpoint under a neutral plan to identify impaired drivers. Every vehicle is briefly stopped, and an officer sees no signs of intoxication in one car. The officer nevertheless orders the driver to open the trunk to search for narcotics. Which statement is most accurate?

High-Yield Points - ⚡ Biggest Takeaways

A Terry stop needs reasonable suspicion; custody-level restraint needs probable cause. A permissible suspicionless seizure does not automatically permit a suspicionless search. Administrative purpose and limited scope decide border, airport, inventory, checkpoint, workplace, and school searches.

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Practice Questions: Seizures of persons and suspicionless searches

1. Using only the supplied file and legal resources, draft a persuasive argument section for the trial court seeking exclusion of the laboratory certificate unless the prosecution presents the analyst for cross-examination. Address the prosecution's business-record and harmless-error arguments and state the requested relief.

2. Using only the supplied file and legal resources, prepare a persuasive memorandum for the supervising attorney analyzing suppression of the physical evidence and confession. Distinguish the Fourth Amendment issues from the Miranda issue and recommend how to prioritize the arguments.

3. Using only the supplied client file and legal resources, prepare a persuasive memorandum supporting the motion to suppress Jordan Lee's recorded confession. Address custody, interrogation, invocation of the right to silence, the effect of the later warnings and waiver, voluntariness, and the likely remedy. Acknowledge the prosecution's strongest counterarguments.

7. A defendant planned to steal electronics from a warehouse. He asked an acquaintance to serve as a lookout, obtained a crowbar, and drove them to the warehouse after it closed. The acquaintance remained in the car while the defendant walked to a rear entrance and inserted the crowbar between the door and its frame. Before damaging or opening the door, the defendant became frightened, returned to the car, and drove away. Police later identified both individuals from security-camera footage. The jurisdiction follows the substantial-step test for attempt and recognizes no statutory abandonment defense. If the defendant is prosecuted for attempted burglary, which of the following is the strongest conclusion?

A. The defendant is guilty of attempt because he intentionally took a substantial step toward completing the burglary.
B. The defendant is not guilty of attempt because he did not enter the warehouse or take any property.
C. The defendant is not guilty of attempt because abandoning the plan before police intervention is a complete defense.
D. The defendant is guilty only of solicitation because asking another person to help cannot constitute an attempt.

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Answer: A. The defendant is guilty of attempt because he intentionally took a substantial step toward completing the burglary.

The defendant is guilty of attempt because he intentionally took a substantial step toward completing the burglary. - The defendant intended to enter the warehouse to steal electronics and inserted the crowbar between the closed door and its frame, strongly corroborating his criminal purpose. - Attempt requires a substantial step, not a damaged door or completed entry; his later departure does not erase the attempt. The defendant is not guilty of attempt because he did not enter the warehouse or take any property. - Entry would be needed to complete the burglary, but it is not required for attempted burglary. - Taking property was his intended crime inside the warehouse, not a prerequisite to liability for attempting to enter it. The defendant is not guilty of attempt because abandoning the plan before police intervention is a complete defense. - The jurisdiction recognizes no statutory abandonment defense, regardless of whether police had intervened. - By the time he became frightened and drove away, inserting the crowbar at the door had already supplied the substantial step. The defendant is guilty only of solicitation because asking another person to help cannot constitute an attempt. - Asking the acquaintance to serve as a lookout may support solicitation, but it was not the defendant’s only conduct. - His own act of placing the crowbar between the warehouse door and frame independently supports attempted burglary.

8. Police arrested a burglary suspect, handcuffed him, and transported him to the station. Before giving Miranda warnings, a detective asked, "Where did you put the handgun taken during the burglary?" There was no immediate threat to public safety. The suspect calmly answered that the handgun was inside a locked container in his apartment. Police then obtained a search warrant based on information independent of the statement and found the handgun where the suspect had described. At a pretrial suppression hearing, the prosecution concedes that the detective conducted custodial interrogation without warnings but establishes that the suspect's answer was voluntary. Which of the following best describes the likely ruling?

A. Both the statement and the handgun are admissible because the questioning occurred before the Sixth Amendment right to counsel attached.
B. Both the statement and the handgun are inadmissible because all evidence derived from an unwarned custodial statement must be excluded.
C. The statement is inadmissible in the prosecution's case-in-chief, but the handgun is admissible because the unwarned statement was voluntary.
D. The statement is admissible, but the handgun is inadmissible because physical evidence receives greater protection than testimonial evidence.

Show answer

Answer: C. The statement is inadmissible in the prosecution's case-in-chief, but the handgun is admissible because the unwarned statement was voluntary.

The statement is inadmissible in the prosecution's case-in-chief, but the handgun is admissible because the unwarned statement was voluntary. - The detective’s question was custodial interrogation without Miranda warnings, and the absence of an immediate public-safety threat leaves the suspect’s answer inadmissible in the prosecution’s case-in-chief. - The handgun remains admissible because the answer was voluntary and police obtained a warrant based on information independent of it. Both the statement and the handgun are admissible because the questioning occurred before the Sixth Amendment right to counsel attached. - Miranda applies to custodial interrogation even before the Sixth Amendment right to counsel attaches. - The detective’s unwarned question therefore bars use of the suspect’s answer in the prosecution’s case-in-chief, despite the independently supported warrant for the handgun. Both the statement and the handgun are inadmissible because all evidence derived from an unwarned custodial statement must be excluded. - Miranda does not require suppression of physical evidence found through a voluntary unwarned statement merely because warnings were omitted. - Here, the independently supported search warrant supplies an additional reason the handgun is admissible. The statement is admissible, but the handgun is inadmissible because physical evidence receives greater protection than testimonial evidence. - This reverses the Miranda distinction: the unwarned answer, not the handgun, is excluded from the prosecution’s case-in-chief. - The voluntary answer does not require suppression of the handgun, which police also found under an independently supported warrant.

Flashcards: Seizures of persons and suspicionless searches

1. What factors determine if a Terry stop has become an arrest?

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The line between a Terry stop and an arrest turns on the objective character of the restraint. A stop becomes an arrest when the restraint is materially more intrusive than the temporary investigation reasonably requires, considering its duration, location, movement, force, and questioning. Transporting a suspect to a police station ordinarily signals an arrest.

2. What is the primary purpose that justifies a suspicionless search, and what is a common boundary fact that limits its scope?

Show answer

A suspicionless search is justified by a special administrative purpose that replaces individualized suspicion. The program must be neutral, minimally discretionary, and limited to that purpose. A common boundary fact is that if the real primary purpose is ordinary crime control, the exception generally fails.

3. When does the Fourth Amendment apply to a search conducted by a private person?

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The Fourth Amendment applies to a private search only if the private person is acting as a government agent or instrument, or if police direct, encourage, or substantially participate in the search. It does not apply to genuinely private searches conducted without government involvement.

4. What two primary tests determine if government conduct constitutes a 'search' under the Fourth Amendment?

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Under Katz, a search occurs if a person has an actual expectation of privacy that society recognizes as reasonable. Under Jones, a search occurs if officers physically intrude on a constitutionally protected area (person, house, paper, or effect) to obtain information.

5. Explain the 'false friend' doctrine and the key distinction for dog sniffs in Fourth Amendment search analysis.

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Under the 'false friend' doctrine, there is no search when a target voluntarily exposes information to an informant or undercover officer. For dog sniffs, it's generally not a search in public places (only revealing contraband), but it IS a search if officers physically intrude on protected curtilage (e.g., a home's porch) to conduct the sniff.

6. What are the two primary ways government conduct can be classified as a Fourth Amendment search?

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A search occurs if government conduct invades a reasonable expectation of privacy (Katz test) or involves a physical trespass on protected property to obtain information (Jones test).

7. When may police conduct a warrantless search based on consent?

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Police may search without a warrant or probable cause when a person with actual or apparent authority voluntarily consents; voluntariness is judged from the totality of the circumstances, and the search must remain within the consent’s scope.

8. What constitutional requirements must a search warrant satisfy?

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A warrant must be issued by a neutral and detached magistrate, supported by probable cause, and particularly describe the place to be searched and the persons or things to be seized. The warrant must also be based on a sworn application.