Evidence collected during an illegal search cannot be used in court based on the

The second option, The Exclusionary Rule

The exclusionary rule prevents the government from using most evidence gathered in violation of the United States Constitution.  The decision in Mapp v. Ohio established that the exclusionary rule applies to evidence gained from an unreasonable search or seizure in violation of the Fourth Amendment. The decision in Miranda v. Arizona established that the exclusionary rule applies to improperly elicited self-incriminatory statements gathered in violation of the Fifth Amendment, and to evidence gained in situations where the government violated the defendant's Sixth Amendment right to counsel.  However, the rule does not apply in civil cases, including deportation hearings

- https://www.law.cornell.edu/wex/exclusionary_rule

a, he promoted disarmament