Apparently he attempted to contact the owner (Apple Inc.). Just because Apple's bureaucracy prevented the phone from being recovered immediately doesn't mean he stole the phone.
He called tech support. If he'd called Apple's main switchboard and asked for Grey Powell, or mailed it to him at 1 Infinite Loop, or e-mailed pictures to sjobs@apple.com, or turned it in to the police, then he'd be faultless. As it was, he did the minimum necessary to say 'Yeah, well I tried to call them but they didn't want it back.'