FYI - The state of surveillance technology I think many of us know the NSA records all electronic communications. One of the technologies that has been around for a while is overhead video surveillance.  This is useful for police tracking of criminals before and after a crime to figure out who was all involved.  It's no different than looking back at a security cam footage to see who broke into a place, after the fact.  Of course it only works if the scene was recorded at the time of the incident in question. So, sometimes when the feds claim they have suspects not long afterwards, they actually were able to track their movements to see where they started from and went to after the fact.  Which is great, if you can trust the feds to not make the average citizen a criminal, like Pelosi and HRC want to do.   100% surveillance isn't all that far away anymore. Old WashPost Article And then there's cell phone tracking.  Ignore the issues Wikipedia has with the article, the technology is real enough. Cell Tracking