33.4 Call Detail Records as Evidence of Cell Phone Location 233 be supplied with any subpoena request for call detail records. Requesting call detail records is covered in Chapter 24. Figure 33.10 shows a portion of a cell tower loca- tion report with the geolocation information for the towers. By matching the cell tower IDs from the call detail records with the tower IDs in the cell tower location report, you can determine the geolocation of the tower using the latitude and longi- tude for the tower. 33.4.1 A Cell Tower Location Example The coverage of a cell tower is normally discussed in terms of its radius. A cell tower with a 1-mile coverage radius is equal to 3.14 square miles or 2010 acres. If a cell phone is connected to one of the three sectors, the area that the cell phone can be in is one-third of the total coverage area, or in this case, 670 acres. One way to think of this is to imagine a subdivision with houses on one-acre lots covered by one sector of the cell tower. If a cell phone is "located" in that sec- tor, it could be in any of the 670 houses. Or if the cell phone is traveling on a road adjacent to the subdivision, it could be in none of the houses at any time. At best, this kind of evidence is circumstantial as to the location of a cell phone at any par-