Wired:

A California student got a visit from the FBI this week after he found a secret GPS tracking device on his car, and a friend posted photos of it online. The post prompted wide speculation about whether the device was real, whether the young Arab-American was being targeted in a terrorism investigation and what the authorities would do.

It took just 48 hours to find out: The device was real, the student was being secretly tracked and the FBI wanted their expensive device back, the student told Wired.com in an interview Wednesday. [...]

Afifi, a 20-year-old U.S.-born citizen, cooperated willingly and said he’d done nothing to merit attention from authorities. Comments the agents made during their visit suggested he’d been under FBI surveillance for three to six months.

The female agent, who handed Afifi a card, identified herself as Jennifer Kanaan and said she was Lebanese. She spoke some Arabic to Afifi and through the course of her comments indicated she knew what restaurants he and his girlfriend frequented. She also congratulated him on his new job.

Via Lee Rosenberg on Twitter, who says, "I'm sure all the limited government proponents in the Tea Party will be outraged by this."