AKWEI VS NSA is an excellent source. And you will notice that the article Akwei VS NSA supplies at least 40 additional references. Unfortunately the NSA has been very sneaky about illegally brain fingerprinting American citizens without our knowledge or consent. A terrible thing.

If a non-believer would spend some time to research patents and such, you could see that the technology exists. Sure, the NSA and Police aren't going to admit using something that will financially break them, or an admission to violating the Constitution of the United States. They may however claim your part of a gang or terrorist organization when you aren't, so the Attorney General can file for a Secret Court Warrant to interrogate you in this manner.

I have personally heard the admission of an individual teaching the police in Missouri to use this technology. Chicago District of the FBI are wide boundaries that include Missouri. The abuse is phenominal and will certainly cause a financial collapsation of the economy when it is fully exposed. A long time ago the CB Radio was a way the police communicated. Nowaday the police use a narrow bandwidth radio that can be directed to a subject with precise alignment with the use of GPS Satellite Systems that Chicago District uses now.