I'm completely confused as to how teaching someone techniques for thwarting lie detectors are "wire fraud and obstruction of an agency proceeding". Obstruction

I'm completely confused as to how teaching someone techniques for thwarting lie detectors are "wire fraud and obstruction of an agency proceeding". Obstruction of agency proceedings is (per 18 USC c 1505) "Whoever, with intent to avoid, evade, prevent, or obstruct compliance, in whole or in part, with any civil investigative demand duly and properly made under the Antitrust Civil Process Act, willfully withholds, misrepresents, removes from any place, conceals, covers up, destroys, mutilates, alters, or by other means falsifies any documentary material, answers to written interrogatories, or oral testimony, which is the subject of such demand; or attempts to do so or solicits another to do so". I'm no lawyer, but that sounds to me like you would have to materially intervene in the actual agency proceedings not merely arm people with knowledge of things like breathing techniques. This strikes me as the same nonsense that used to be used against people that taught lockpicking.