Last year we editorialized about the use of facial recognition software by government ("In Favor of Access to Facial Recognition Technology for Law Enforcement"). We pointed out that this technology would greatly increase the power of the state to track and record the movements of individuals who are not suspected of any crime but may otherwise be of interest as, for example, political critics, as it is being used abroad. We also pointed out that its validity and probative value when used in law enforcement would be tested by the same process and the same standard that has been applied over the years to fingerprints, ballistics, drug sniffing dogs, DNA evidence and other technical forms of proof, including technologies like voiceprints and the polygraph that have been rejected as unreliable.