The Fourth Amendment to the U.S. Constitution prohibits unreasonable searches and seizures. In criminal cases, evidence discovered during an unreasonable search or seizure, such as during a warrantless arrest, can be suppressed in court. However, in civil cases, this “exclusionary rule” is generally not available.
The American legal system views immigration law proceedings civil matters. This was determined by the Supreme Court in the decision INS v. Lopez-Mendoza, 468 U.S. 1032 (1984). Because of this, the exclusionary rule usually cannot be used by respondents in immigration...