U.S. v. Leon (1984) disagrees with you. Added a "good faith" exception to the 4th amendment. Meaning that, if the police were acting on a warrant they believe

U.S. v. Leon (1984) disagrees with you. Added a "good faith" exception to the 4th amendment. Meaning that, if the police were acting on a warrant they believe they obtained correctly, the evidence they collected usually is admissible. In this case, both they and the judge thought disabling an unknown tracking device was probable cause to search for the device. During that search, the police found drugs and drug paraphernalia.