⚡ 10-Second Rule
The government needs a good reason, often a judge's permission slip, before searching your private stuff or grabbing you.
🧒 ELI-10 Scene
Nora keeps a diary in a locked drawer in her bedroom. The family rule says Mom can't open that drawer on a hunch. Mom needs a signed note from Grandpa Lou, the family's fair referee. The note must say exactly which drawer and exactly what Mom expects to find. But the postcard Nora left on the kitchen table? Anyone can read that. Nora showed it to the world. And if nosy neighbor Theo sneaks in and reads the diary, that's bad — but it breaks no family rule. The rule only leashes Mom. Courts treat the government like Mom: leashed, note required, and only for truly private things.
⚖️ Actual Rule
The Fourth Amendment provides: "The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized." It restrains only government actors and their agents, not private parties. Burdeau v. McDowell, 256 U.S. 465 (1921). A "search" occurs when the government invades a reasonable expectation of privacy — under Justice Harlan's Katz concurrence, "first that a person have exhibited an actual (subjective) expectation of privacy and, second, that the expectation be one that society is prepared to recognize as 'reasonable.'" Katz v. United States, 389 U.S. 347 (1967) ("the Fourth Amendment protects people, not places"). A search also occurs when the government physically trespasses on persons, houses, papers, or effects to gather information. United States v. Jones, 565 U.S. 400 (2012). A person is seized when, by physical force or submission to a show of authority, a reasonable person would not feel free to leave. United States v. Mendenhall, 446 U.S. 544 (1980); California v. Hodari D., 499 U.S. 621 (1991). A valid warrant requires probable cause, supported by oath or affirmation, particularity as to place and things, and issuance by a neutral and detached magistrate. Johnson v. United States, 333 U.S. 10 (1948). A full custodial arrest requires probable cause; a brief investigative stop requires only reasonable suspicion of criminal activity based on articulable facts. Terry v. Ohio, 392 U.S. 1 (1968). Only a defendant whose own reasonable expectation of privacy was invaded may challenge a search. Rakas v. Illinois, 439 U.S. 128 (1978).
ELI-10 translation: the leash binds only the government, covers only truly private things, and a fair judge writes the specific permission slip.
🔍 Ask These Questions
- Was the searcher a government actor — police, or a private person directed by police? (A nosy neighbor snooping on his own breaks no rule.)
- Was there a search or seizure — an invaded reasonable expectation of privacy, or a physical trespass or grab? (Did they poke into something kept hidden, or grab a person or thing?)
- Does the defendant have standing — was it his privacy invaded? (You can only complain about your own diary, not your friend's.)
- Was there a valid warrant — probable cause, oath, particularity, neutral magistrate? (Did a fair referee sign a note naming the exact drawer?)
- If no warrant, does a recognized exception apply? (No permission slip means the police need a special excuse — next lesson.)
- If a person was grabbed, was it an arrest or a Terry stop? (A full grab needs strong proof; a quick sidewalk stop needs a specific, explainable hunch.)
[NJ-VARIANT: flagged for future Eli Explains NJ Law module]
⚠️ Bar Trap
Exam language: Examiners plant a search conducted by a private party — a landlord, hotel manager, airline employee, or suspicious relative — then bait you into suppressing the evidence. The Fourth Amendment regulates only government action; police who merely view what a private search already exposed conduct no new search.
ELI-10: The privacy rule is a leash on the government, not on nosy neighbors. If Theo finds the diary first and shows the page to Mom, Mom broke no rule by looking.
🧪 Question
A hotel manager, suspecting that a guest was violating the hotel's no-smoking policy, used a master key to enter the guest's room while the guest was out. On her own initiative, the manager unzipped a suitcase on the bed and saw several baggies of white powder. She called the police. When an officer arrived, the manager reopened the suitcase and showed the officer the baggies, which the officer then seized. Field tests confirmed the powder was cocaine, and the guest was charged with possession. The guest moves to suppress the baggies, arguing the warrantless entry and search violated the Fourth Amendment.
How should the court rule?
(A) Grant the motion, because the officer seized the baggies without a warrant. (B) Grant the motion, because the guest had a reasonable expectation of privacy in the zipped suitcase. (C) Deny the motion, because the manager searched as a private actor without police involvement, and the officer viewed nothing beyond what her search had already exposed. (D) Deny the motion, because hotel guests have no reasonable expectation of privacy in their rooms.
Answer: (C). The manager acted entirely on her own, so the Fourth Amendment never applied to her search; the officer's later viewing did not exceed the scope of what the private search had already exposed, so it invaded no remaining privacy interest. NEEDS HUMAN VERIFICATION — confirm the private-search-replication principle citation (United States v. Jacobsen, 466 U.S. 109 (1984)) before publication.
💡 Why the Wrong Answers Are Wrong
- (A) assumes a warrant requirement, but that requirement attaches only to government searches; the exposing search here was private.
- (B) correctly spots the privacy expectation but forgets a private actor, not the government, breached it.
- (D) misstates the law: hotel guests do keep a reasonable expectation of privacy in their rooms against government intrusion.
- ELI-10: The misconception is thinking the privacy rule binds everybody. It only binds the government, so a neighbor's snooping doesn't count.
