Nemesisghost (1720424) writes "A top German police officer decided to track his daughter's online activity by placing a trojan on her computer. When a friend found it, he decided to take revenge and hack him back. The friend was then able to find work emails, from which he gained access to the German police "Patras" server, which is used to log GPS & cellphone location data of suspects.
Original German Story"
Link to Original Source