Holding: A dog sniff at the front door of a house where the police suspected drugs were being grown constitutes a search for purposes of the Fourth Amendment.
Judgment: Affirmed, 5-4, in an opinion by Justice Scalia on March 26, 2013. Justice Kagan filed a concurring opinion in which Justice Ginsburg and Justice Sotomayor joined. Justice Alito filed a dissenting opinion in which Chief Justice Roberts, Justice Kennedy, and Justice Breyer joined.
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