 In his challenge, Harris pointed out that on each of the two occasions in which his vehicle was searched, the dog alerted his handler to contraband which was not present in the vehicle.The police officer testified that on the date of Harris's arrest, he had been on the force for three years, and had been a canine handler for two.Aldo completed a 120-hour drug detection training course two years earlier with his handler at the time, and was certified by an independent company that certifies K-9s.