People wait to enter outside the US Supreme Court March 21, 2011 in Washington, DC. The Court hears oral argument  in the case of Davis v United States Monday on prosecutors’ use of evidence that was legal for police to seize when they did, but later became illegal. Another test of the scope of the “good faith” exception to the exclusionary rule under the Fourth Amendment of the Constitution, which guards against unreasonable searches and seizures.  AFP PHOTO/Brendan SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)