I've been reading of late that criminal activity will never be changed regardless of who is President. There's a solution to stopping criminals, the only negatives are that is it is a minor invasion of privacy and may be considered unethical. There's always been a problem with tracking down the criminal which is why they're on the wanted list. There's also sometimes problems with identifying a person or trouble finding their records. Its simple: The UN can begin requiring everyone to go to the hospital and get a microchip inserted into their right wrist or left hand. This microchip will be heavily verstile and can even be used for things such as paying for groceries without a credit card, sending a voice message and learning more about a person.
Say you go to the hospital, the Doctors there can scan where the chip was inserted. A blue or green dot will be tattoo'd over the insertion site. Doctors and other medical officials will have access to your full name. age. gender, and medical records. While a grocery clerk will have limited access to your first name and the -exact- amount that you have to pay with, without seeing your credit card number or anything else. Law Enforcement officials [Required] and family members [Optional] will be able to track your location down on demand. If you go missing, they will be able to find you. If you're trying to escape, they will find you with else. Need to unlock and start your car? Scan it with your microchip and your car is less likely to get stolen. Lost the keys to your house? Use your microchip.
You might say that one could remove this chip. It will be unlikely. The microchip will be made of magnesium and create a very painful electrical shock that is powerful enough to incapacitate you or knock you unconcious if you attempt to remove it without the codes of your keeper [Law Enforcement Official, Doctor, etc..].
Having a microchip can also be customized to fulfill the needs of being under arrest while at your own home. Similar to a home-arrest band around the leg, the microchip will have you "chime" in, in to your Law Enforcement official every few hours. You will be monitored 24/7 until your court date ends and the judge deems you worthy not to go to actual jail or any other harsh sentences such as death or life in prison.
The microchip could also be used as a [limited] vocal communicator, a wallet, and more.