MalikX
Superstar
Not sure if this was mentioned but your cell phone data can easily be tracked. Every picture you take has EXIF data which contains the GPS coordinates, date, time ect
Also, when you make phone calls, your phone sends a signal to the tower closest in its proximity. The communication can be back tracked and you can get a general idea where the call came from. That's part of what got Aaron Hernandez (Former NFL Player) caught up on his murder trial.
The tower thing is also why you see people in movies make a phone calls and hang up quickly so that the call can't be traced. I doubt the TSA friend did this because it might require the call to be live and I also doubt he would have access to the equipment. So I would guess that he looked at the EXIF data on the picture and GPSed the coordinates to find the exact location the picture was taken.
Aaron Hernandez: Testimony on cell phone pings, tire tracks in Aaron Hernandez trial
Either way he the homie for life for that