[umgud]

Why stop at ballistic fingerprinting? If everyone in America had an implanted GPS chip and a computer system was in place to manage the data, all big brother would need to solve a crime is to check the computer to see what person was at the crime scene.

[MoralSense]

Tires. Let's have a national registry of tire treads. Record the tread of every new tire sold in the U.S., and record the purchaser's name and address. Lots of cars are involved in crimes, aren't they?