This week, the U.S. Supreme Court is considering whether attaching a high-tech tracking device to suspect's vehicle without a warrant is constitutional.
The case, which was heard Tuesday, tests law enforcement's use of the latest technology to fight crime as it raises the specter of a "Big Brother" government knowing one's every move. GPS tracking lets police engage in round-the-clock surveillance—without a person's knowledge—over a prolonged period that could seldom be matched by cops on a beat or other traditional observation, reports USA Today.