they can only search an area where the dog gets a hit, like the tires, or spare tire well. courts are now overturning evidence where they say 'well the dog smelled something'. if u do get caught, its an easy defense in court, have the dog smell out a bottle of test in the courtroom. the evidence will have to be thrown out because it was obtained during an illegal search. u wont get it back, but u wont be charged.