They're about as "accurate" as a coin-flip, but prosecutors have convinced judges that dogs and their handlers are so infallible that the 4th Amendment is completely satisfied without a warrant or probable cause.
Robert Guest at I Was the State posted an interview this week with an Austin-based consultant who reviews the performance of drug sniffing dogs. In his experience, most drug dogs are only accurate 52% of the time, meaning that 48% of the time dogs wrongfully give police probable cause for a search.Read the article. Also check out the rest of the blog.
Why not just flip a coin to see if there's probable cause?