The headline is incorrect, however. The correct headline would be "Supreme Court Rules That Police Stalling To Wait For Drug-Sniffing Dogs Violates Constitution." That has absolutely nothing to do with what police can and can't do - or will or won't do. Only a decision on the legality of their actions. Of course there is always the excuse, "I smelled the odor of marijuana." and then the little tug on the leash or tap of the foot that makes the dog "alert" to provide "probable cause."