Illinois v. Krull

Illinois required scrap-metal licensees to let police inspect their records without a warrant at any time. Krull (defendant), a junkyard operator, was arrested when a warrantless inspection turned up stolen cars. The day after the search, the Illinois Supreme Court struck down the inspection statute as unconstitutional, and Krull moved to suppress the evidence on that basis; the state invoked the good-faith exception.

Whether the good-faith exception to the exclusionary rule applies to an officer who relied on a statute later held unconstitutional.