In the days of Jack Bauer and CTU we need to remember that technology is now available in part to the regular person. Someone sent me a link to a site that can track anyone if you simply have that person's cell phone number. It has to do with how the cell phone pings in conjunction with satellites we have in space. Here is the site but let me caution you to only use this on an as needed basis, it could be easily abused. Click on this
LINK.