The ruling upholds a Florida Supreme Court ruling throwing out evidence seized in the search of Joelis Jardines’ Miami-area house. That search was based on an alert by Franky the drug dog from outside the closed front door.

Writing for the majority, Justice Antonin Scalia said an American has the Fourth Amendment right to be free from the government’s gaze inside their home and in the area surrounding it. “The police cannot, without a warrant based on probable cause, hang around on the lawn or in the side garden, trawling for evidence and perhaps peering into the windows of the home,” Scalia wrote for the majority.