Johnson v. United States

Background

A woman staying in a Seattle hotel was arrested after police narcotics officers and federal agents followed a confidential informer's tip and smelled burning opium outside her room. The officers knocked, identified themselves, and she opened the door and admitted them. Inside, officers said they placed her under arrest and searched the room, finding opium and warm smoking equipment. The trial court admitted that evidence, the defendant was convicted on narcotics counts, and the lower court affirmed the conviction.

Reasoning

The Court addressed whether officers could lawfully enter and search private living quarters without a warrant. Justice Jackson wrote that the Fourth Amendment protects homes from warrantless intrusion and that odors, while potentially sufficient to persuade a judge to issue a warrant, do not justify entering without one. Here the officers only learned she was alone after entering; they then arrested her based on what they saw, creating an impermissible circle where the entry justified the arrest and the arrest justified the entry. The Court held that officers must seek a neutral judge's approval unless exceptional circumstances exist, and found no such urgency here. The Court therefore reversed the conviction.

Real world impact

The decision reinforces that police generally need a warrant before entering private rooms or homes based on tips or odors alone. Hotel guests and residents gain stronger protection against surprise entries and searches. Police must present their evidence to a judge unless true emergencies are shown; mere inconvenience or slight delay is not enough.

Dissents or concurrances

The Chief Justice, Justice Black, Justice Reed, and Justice Burton dissented; the opinion lists their disagreement but does not elaborate their reasons.