Wong Sun v. United States

Wong Sun v. United States (1963) is a Supreme Court case that established the "fruit of the poisonous tree" doctrine. It ruled that evidence illegally obtained by law enforcement, such as through an illegal search or arrest, generally cannot be used in court. The case emphasized that evidence found as a result of illegal actions, like a suspect's confession obtained without proper rights, is inadmissible. However, if the prosecution can show that the evidence was discovered independently of the illegal activity or that the connection was sufficiently attenuated, it may still be used. This case underscores the importance of lawful procedures in criminal investigations.