In this civil case, the police were successfully sued in the trial court based on a false arrest charge where the police arrested over a dozen people at a party at a house where the partygoers were not entitled to be. The U.S. Supreme Court reversed the trial court and the DC Court of appeals, holding that probable cause existed to arrest all of the partygoers and that all of the officers were entitled in any case to qualified immunity.
The case is District of Columbia v. Wesby.
https://www.supremecourt.gov/opinions/17pdf/15-1485_new_8n59.pdf