City of Indianapolis v. Edmond

Indianapolis set up vehicle checkpoints using standardized, discretion-limited procedures to interdict illegal drugs, stopping 1,161 vehicles and making 104 arrests, roughly half drug-related, over several months in 1998. Edmond and Palmer (plaintiffs), stopped at such a checkpoint, brought a class action claiming the roadblocks violated the Fourth Amendment; the court of appeals agreed, and the city sought Supreme Court review.