Fourth Amendment Twist in the Case of the Tainted Doorknob

​“Curtilage” is a legal word that means the enclosed area around a home in which the occupant has an expectation of privacy. Within the zone of curtilage, the Fourth Amendment implications usually force law enforcement officers to obtain a warrant before they can enter. Where curtilage begins and ends has long been a matter of fine, Jesuitic distinctions, hotly contested in courts across the country.
 
Sometimes the boundaries are obvious. In a landmark case, the U.S. Supreme Court in 2021 held in Lange v. California that a police officer who followed a driver into his garage entered his curtilage. The officer had no right to do so without a warrant. PPSA was pleased to see the Court adopt logic similar to our amicus brief in Lange.
 
So much for garages. Now what about doorknobs?
 
Terrell McNeal Jr. of Mankato, Minnesota, was arrested after police obtained a probable cause warrant to enter his apartment and found controlled substances, cash, and guns. The evidence behind the warrant was derived from his doorknob. A police officer had earlier obtained a code from the apartment’s landlord to enter the structure’s interior communal space. He had proceeded to swab the doorknob of McNeal’s front door. It tested positive for two controlled substances. That was the basis of the warrant.
 
The doorknob was tainted, to be sure. But that left a nagging legal question: Was the search warrant itself tainted by a violation of McNeal’s curtilage?
 
A district court did not think so. It bought the prosecution’s argument that the door handle and lock were outside of McNeal’s home. A county prosecutor made this point on appeal: “If the court looks at the door itself, it prevents people from looking into the home. That doesn’t make the outside of the door curtilage.”
 
Actually, it does, ruled the Minnesota Court of Appeals. On June 10, the appellate court found that officers have “no implied license to remove material from the door handle and lock for laboratory testing.”
 
The court did distinguish this case from one in which a search warrant was obtained after a drug-sniffing dog found the aromatic traces of narcotics in the air in front of an apartment. But the officers in the McNeil case, the court ruled, “went a step further and collected a sample from a door handle and lock that were physically attached to and indivisible from appellant’s home.”
 
The Minnesota Court of Appeals made the correct decision, voiding the conviction. As for McNeal, the authorities kept him in prison since his arrest more than two years ago, until the appellate court ruled in his favor. But at least the court recognized that swabbing any part of a home without a warrant is a violation of the Fourth Amendment.