When officers lawfully deploy a narcotics-detection dog on the exterior of a vehicle and, without any direction, prompting, or facilitation by officers, the dog briefly touches the vehicle or places its snout through an open window, does the dog's conduct constitute a Fourth Amendment search by officers?

QUESTION PRESENTED FOR REVIEW The question presented is: When officers lawfully deploy a narcotics-detection dog on the exterior of a vehicle and, without any direction, prompting, or facilitation by officers, the dog briefly touches the vehicle or places its snout through an open window, does the dog’s conduct constitute a Fourth Amendment search by officers?