If you’ve ever wondered what an FBI GPS tracking device looked like, take a gander at this Guardian ST820 in the wild. Designed for law enforcement, this ended up on a Redditor’s friend’s car after his father died. The intimation in the post is that the father was a Muslim religious leader and was somehow in trouble with the feds.
While one would assume you need more than probable cause to track someone through space and time, apparently your car sitting in your driveway is fair game for tracking devices.