“Location data for cops is like a kid in a candy store,” said Mark Rasch, former head of the Justice Department’s Computer Crime Unit. “It’s a wonderful investigative tool which is highly intrusive of personal liberty and our rules on privacy, and rules governing access to this are not only antiquated but confusing and conflicting. Add to that a profit motive by carriers, and lack of sufficient oversight on law enforcement access to the records, and you have a prescription for, at a minimum, violations of civil liberties.” Rasch is now a consultant with Virginia-based cyber security firm CSC.