Source: The Intercept
TSA has trained and deployed thousands of Behavior Detection Officers, and the program has cost more than $900 million since it began in 2007, according to the GAO.
... former Behavior Detection Officer manager, who also asked not to be identified, told The Intercept that the program suffers from lack of science and simple inconsistency, with every airport training its officers differently. “The SPOT program is bullshit,” the manager told The Intercept. “Complete bullshit.”