Pennsylvania v. Labron

The Supreme Court established the mobile conveyance exception to the warrant requirement of the Fourth Amendment because of the necessity of coping with rapidly disappearing objects. However, the Court has shifted the focus of this exception from the exigency of the speed of the vehicle to the fact that persons have only a reduced expectation of privacy in an automobile. The Court discarded the original requirement that the government establish that the automobile searched was in immediate danger of disappearing. The Court stated “if a car is readily mobile and probable cause exists to believe it contains contraband, the Fourth Amendment thus permits police to search the vehicle without more.”