The 4th Amendment: Search and Seizure : Throughline The Fourth Amendment is the part of the Bill of Rights that prohibits "unreasonable searches and seizures." That question has fueled a century's worth of court rulings that have dramatically expanded the power of individual police officers in the U.S. Today on the show, how an amendment that was supposed to limit government power has ended up enabling it. Throughline The 4th Amendment: Search and Seizure We the People: Search and Seizure Listen · 48:50 48:50 Enlarge this image Kevork Djansezian/Getty Images Kevork Djansezian/Getty Images Guests: Sarah Seo, Policing the Open Road: How Cars Transformed American Freedom.