The town of Liberty, KY decided that all residents and individuals that work within the city should purchase a sticker and have it displayed in the window. A number of people, apparently mostly teachers, opted not to comply with the ordinance.
The city council, outraged that someone would flout their authority, ordered the police to set up roadblocks in order to issue citations for non-compliance. During the course of a stop, an individual's car was searched and marijuana was found. He moved to have the evidence suppressed, arguing that the search was illegal.
The Kentucky Supreme Court, in a unanimous decision, held that the searches were in fact illegal and the police had no basis for performing them.
ETA: I can't believe I missed this the first time around.
Alternate headline: "Kentucky Supreme Court says 'May the 4th be with you'"