Looks like verification of the national scope of the problem to me.
Well--the awful truth is that this sort of sordid behavior has gone on since probably the beginning of time. There have certainly been documented cases of this kind of activity right here in the good ole USA that did not involve aliens--illegal or otherwise. Sad to say, but red blooded Americans are capable of doing this, and have in the past and will continue to do so in the future.
Who knows how wide-spread it is? Thanks goodness, it seems to be a rare event--but then, how much of it is never discovered?
Of course, our "open borders" make it much more prevalent, apparently. May everyone ever participating in any way with this heinous activity rot in hell for all eternity! And may these pitiful victims of these people find justice and everlasting peace.