My understanding is they prosecute sex perverts when they can.
I don’t see that they are handling this case any different than any other alleged abuse case.
Even if they can’t get them on polygamy, there’s still the child sex abuse angle and welfare fraud.
How is someone prosecuted for polygamy if any 1+ marriage(s) are performed only in a "church" ie not licensed via normal civil channels? How is that any different from individuals having multiple girlfriends and taking oaths of any "church" they wish to invent for themselves?
As to welfare fraud, how is that incurred? A majority of black & Hispanic childbirths are now out of wedlock - are these instances of welfare fraud?
The only thing authorities can get the FLDS on is statutory rape. Problem is, marriage of minors, subject to different state age limits (typically 16), is ok with parental approval. The FLDS has the perfect hook, because, guess what, the brainwashed mothers provide the necessary parental approval.
When this case is ultimately resolved (which may take 5-10 yrs), the FLDS (and any other sex cult [hint: Muzzies]) is going to have pretty clear guidelines: don't marry 1+ in a civil ceremony, welfare for "unwed" mothers is legitimate, and minor age limits somewhere between 16-18, with parental approval, will be established for the sex cultists to practice their dark arts.