In a big victory for privacy advocates and a blow to law enforcement, a D.C. federal judge ruled that authorities cannot track a suspect's cell phone without a warrant. CBS News: Law enforcement use of one tracking tool, the cell-site simulator, to track a suspect's phone without a warrant violates the Constitution, the D.C. Court of Appeals said Thursday in a landmark ruling for privacy and Fourth Amendment rights as they pertain to policing tactics. The ruling could have broad implications for law enforcement's use of cell-site simulators, which local police and federal agencies can use to mimic a cell phone tower to the phone connect to the device instead of its regular network.  In a decision that reversed the decision of the Superior Court of the District of Columbia and overturned the conviction of a robbery and sexual assault suspect, the D.C. Court of Appeals determined the use of the cell-site simulator "to locate a person through his...(Read Full Post)