Science is becoming a more important part of catching a killer or terrorist and keeping the innocent out of jail.

A Seattle neuroscientist is leading the way with technology based on a simple fact: your brain can't lie.

An odd looking headband, flashing words on a computer screen, and a couple clicks of a mouse could be the secret to putting a murderer behind bars.

"It's a game changer in the field of global security," said Dr. Larry Farwell, Chairman of Brain Fingerprinting Labs who developed "brain fingerprinting" - a lie detector test for the 21st century.

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