George Maschke writes: Last year, the McClatchy newspaper group reported on a federal criminal investigation into individuals offering instruction on how to pass polygraph tests. The ongoing investigation, dubbed "Operation Lie Busters," has serious free speech implications, and one of the two men known to have been targeted is presently serving an 8-month prison term. The other, Doug Williams, himself a former police polygrapher, has this week for the first time gone public with the story of federal agents' February 2013 raid on his office and home. Williams, who has not been charged with a crime but remains in legal jeopardy, is selling his story in an e-book. Public interest website AntiPolygraph.org (which I co-founded) has published a synopsis.