Which case is known as the "Fruit of the Poisonous Tree Case"?

The phrase "Fruit of the Poisonous Tree" originates from the case of Wong Sun v. United States. This legal doctrine holds that evidence obtained through unlawful means, such as an illegal search or coerced confession, is inadmissible in court. In Wong Sun, the Supreme Court ruled that evidence derived from an initial illegal act is also tainted and should be excluded from trial. This case established a critical precedent in the context of search and seizure laws, reinforcing the principle that law enforcement must adhere to constitutional safeguards during investigations.

The other cases listed do not specifically address this doctrine. Florida v. Royer deals with the limits of stop-and-frisk procedures, Carroll v. United States pertains to warrantless searches of vehicles based on probable cause, and Brinegar v. United States discusses probable cause and the seizure of evidence in relation to the Fourth Amendment. While each is important in their own right, they do not encapsulate the "Fruit of the Poisonous Tree" doctrine as definitively as Wong Sun v. United States does.