Most of the "k9's" are trained to "alert" when the cop gives a specific hand signal, or vocal command thereby allowing him to now search your vehicle based on a false PC, "because the dog alerted". Due to these dog nazis, your 4th amendment rights are already gone. They will circle the car and let the dog jump on the vehicle scratching the s--t out of your exterior and interior, and when they find nothing, tough s--t, you now have a damaged vehicle thanks to Johnny law, and you can't recover any compensation for the repairs. So what the SCOTUS ruled means nothing in the real world.