Cell tower information. This is transactional data that indicates which phones are calling at what time and relative direction and distance the phone is from the specified tower. Orders can be written for multiple towers to recreate routes traveled and locations where the phone was stationary as well as associated numbers being called or making calls in order to build networks of associates.

These are fairly standard affidavits that have been written by LE to support investigations for about 20 years now.

Cell phones are basically complicated computer controlled duplex radios. Add some GPS mojo and Google Earth to make some very impressive courtroom presentation. Even without audio (court ordered wire tap) this type of information can be very convincing to judges, prosecutors, and juries.

Be safe.