Why would they bother? He's done nothing wrong.
I hope it was authorized as UPS policy states...
"For reasons of security, personal safety, integrity, and privacy, UPS has firm business rules concerning employee usage of recording devices inside the workplace. The workplace refers to all UPS property, including buildings, aircraft and on-road vehicles."
"use of all recording devices in any UPS facility for anything other than authorized business purposes is prohibited. Employees may possess cell phones with cameras, or other devices capable of recording pictures,video or audio, while on UPS facilities provided that the recording capabilities are not used"
copyright 2011 United Parcel Service of America, Inc
Drivers and inside employees have been terminated for violating this policy no matter what their intent was.