Supreme Court Says No to Dog Sniffs That Unnecessarily Prolong Traffic Stops

In a typical scenario, a police officer can't conduct a dog sniff after completing the ticket-issuing process.

In 2005 the U.S. Supreme Court okayed police dog sniffs during traffic stops. (Illinois v. Caballes, 543 U. S. 405 (2005).) But ten years later the Court clarified. It held that a police stop that takes longer than necessary to address the reason for the stop violates the Fourth Amendment. So, suppose an officer witnesses a simple traffic violation and doesn’t have reasonable suspicion of other wrongdoing. It’s illegal for that officer to have a dog sniff for drugs after completing the tasks related to the traffic infraction. (Rodriguez v. U.S., 575 U. S. ____ (2015); for more, see Traffic Stops and Police Dog Sniffs.)