Reading a recent article in the Seatle P.I. about the police out there tracking missing people using cell phone records without a warrant. The mission of the police, in the cases discussed, was all good but the article brings up some interesting questions of legality and privacy and it suggests a few more.
A quick scan with Google reveals that this is quite a wide-spread phenomenon and that polices forces at all government levels -- local, state and federal -- all across the country are using this technique for finding "missing" people.

