Under which condition does a private citizen become an agent of the government in search and seizure matters?

• A. When they witness a crime
• B. When they make contact with the police
• C. When they are detained
• D. When they hire a private investigator

Answer: (C)

A private citizen becomes an agent of the government for search and seizure purposes when the state takes control of them—when they are detained by the police. Once police detain a private person, they can direct or rely on that person’s actions as if the government conducted the search or seizure itself, making the Fourth Amendment’s reach apply to those actions. Merely witnessing a crime, or merely contacting the police, or hiring a private investigator does not place the private individual under government control in the same way, so those situations don’t convert the private person into a government agent.