Article neglects to say whether  Hawley was a targeted "person of interest", perhaps because the FBI was not willing to provide that info.  Also there's no info about the confidential informant: what's his/her interest?  Concerned citizen?  or Someone with in anticipation of some kind of reward for finding anyone of 'suspicion' great enough to warrant investigation? or Someone specifically trying to lure Hawley into compromising himself [as in: had asked Hawley if he could/would find such material, with a promise of profit for Hawley if he did]?   

There's no evaluating the worth of this 'news tidbit', beyond it's promotional value to the LE force involved, w/o the above info, as well as test results on the material in question.   I mention this because I'm tired of various LE agencies self-promoting, aggrandizing their mission to win popular support and promote fearfullness - at the expense of people who are presumed innocent, if we have any respect for our Constitution.