Well it seems that India has now got the ability to convict criminal based on what is essentially a brain scan. Its said to be more effective than a standard polygraph because there are certain portions of the brain that activate during memory recall vs general recognition to something known. I kind of think this is a break through in technology and understanding the human mind. It also looks like there are several companies in the US that have looked in to this as well.

More of the story available at the New York Times.