Officer Rhodes then arrested Collins. Of the house to conduct an investigation in violation of the Fourth Amendment.Debates over the scope of unreasonable searches and seizures sparked the American Revolution as we'll learn in a moment. If a car is readily mobile and probable cause exists to believe it contains contraband, the. U.S. always purge the taint of an illegal arrest. The Fourth Amendment vehicle exception does not give law enforcement permission to search vehicles parked within the curtilage of a suspect's home. Collins stresses that the Supreme Court has never ruled that police may search a vehicle within the curtilage without a warrant. Eas enumerated in the Fourth Amendment itself. See. Unavoidably Empirical Fourth Amendment: A Case Study of Kansas v. As a general rule, the Fourth Amendment requires police to have a warrant to conduct a search.