“Today the U.S. Supreme Court unanimously ruled formerly http://www.washingtonpost.com/politics/courts_law/high-court-sides-with-aldo-a-drug-sniffing-dog-says-police-dont-have-to-prove-reliability/2013/02/19/db27748c-7aa7-11e2-9c27-fdd594ea6286_story.html that ‘a court can presume’ an alert by a drug-sniffing dog provides probable cause for a search ‘if a bona fide organization has certified a dog after testing his reliability in a controlled setting’ or ‘if the dog has recently and successfully completed a training program that evaluated his proficiency in locating drugs.’ The justices overturned a 2011 decision in which the Florida Supreme Court said police must do more than assert that a dog has been properly trained.”
http://reason.com/blog/2013/02/19/scotus-approves-search-warrants-issued-b