“Brain fingerprinting uses a headband with sensors to measure brain waves, which promoters say can help authorities determine the truth by detecting information stored in the brain.

An example is that a murder investigation could be aided if showing a picture of a murder scene to a suspect reveals brain wave measurements that indicate familiarity with the scene. The brain waves are fed through an amplifier into a computer that uses software to display and interpret them.

The hope is the results will become widely accepted as scientific and legal evidence, such as DNA tests.

Results from a test in 2000 on a man convicted in a 1977 Iowa murder showed his brain didn’t hold specific knowledge of the crime but did contain details about the night of the murder that were consistent with his alibi.” — Seattle Post-Intelligencer