(Portland, OR) -- Police say an Apple Air Tag is responsible for helping detectives track down and arrest a robbery suspect. Police say the robbery happened Thursday afternoon at a business on Northwest Broadway, where the suspect allegedly stole the victim's wallet and phone. Police used the phone to track the suspect to an Embassy Suites Hotel, where he allegedly ran and pulled a fire alarm. Police found a fake pistol, but the suspect was gone. Before he fled, he stole a backpack with an Apple Air Tag inside, and police used that to track the suspect to North Portland, where 39-year-old Justin Johnston was arrested.