Searches conducted pursuant to a warrant: police must have warrant to search unless  search is pursuant to one of six exceptions to the warrant requirement; probable cause required to obtain a warrant; warrant must be precise on its face (must describe with particularity the places to be searched and items to be seized); search of third-party premises allowed as long as probable cause to believe evidence will be found; warrant must be issued by a neutral and detached magistrate; only police may execute a warrant and it must be done without unreasonable delay; police must knock and announce unless reasonable suspicion that it would be dangerous or futile to do so; any contraband or fruits/instruments of crime lawfully discovered during search may be seized even if not specified in the warrant; cannot search people on premises not named in the warrant