One principle associated 
One principle associated with this amendment was upheld nationally in Weeks v. United States. This amendment was held not to apply formally to students in New Jersey v. TLO, and a guideline on "reasonable suspicion" was added in Terry v. Ohio. This amendment is described in the "fruit of the poisonous tree" metaphor,  an extension of this amendment's exclusionary rule. This amendment was the subject of Mapp v. Ohio, and states that evidence acquired illegally is inadmissible. The constitutional right this amendment provides is limited if there is "probable cause." For 10 points, name this Bill of Rights Amendment which protects against illegal searches and seizures.
One principle associated with this amendment was upheld nationally in Weeks v. United States.
Fourth Amendment to the United States Constitution