Jeff,

I don't know enough to speak to the validity of "brain fingerprinting," but Dr. Drew Richardson, a retired FBI supervisory special agent and a frequent contributor to these discussion threads, is Vice President for Forensic Operations and Senior Forensic Scientist at Brain Fingerprinting Laboratories, Inc., the developer of this technique. He is on a trip at the moment, but perhaps he could provide you with additional information upon his return. In the meantime, check out the referenced website.