FILE - In this Dec. 6, 2011 file photo, Miami-Dade retired narcotics detector canine Franky looks on during a demonstration in Miami. Franky the drug dog's super-sensitive nose is at the heart of a question being put to the U.S. Supreme Court: Does a police K-9's sniff outside a house give officers the right to get a search warrant for illegal drugs, or is the sniff itself an unconstitutional search? (AP Photo/Alan Diaz, File)

Associated Press
FILE - In this Dec. 6, 2011 file photo, Miami-Dade retired narcotics detector canine Franky looks on during a demonstration in Miami. Franky the drug dog's super-sensitive nose is at the heart of a question being put to the U.S. Supreme Court: Does a police K-9's sniff outside a house give officers the right to get a search warrant for illegal drugs, or is the sniff itself an unconstitutional search?  (AP Photo/Alan Diaz, File)
FILE - In this Dec. 6, 2011 file photo, Miami-Dade retired narcotics detector canine Franky looks on during a demonstration in Miami. Franky the drug dog's super-sensitive nose is at the heart of a question being put to the U.S. Supreme Court: Does a police K-9's sniff outside a house give officers the right to get a search warrant for illegal drugs, or is the sniff itself an unconstitutional search? (AP Photo/Alan Diaz, File)
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