The problem with prosecuting anyone belonging to an entity calling itself a church is the protection of free practice of religion that is explicitly stated and guaranteed in the First Amendment to the Bill of Rights.  These days that means federal and state law enforcement agencies tend to tread very lightly when it comes to charging any church member of a crime unless an act rises to the level of something flagrant such as mass murder or mass rape.

Speaking just of federal law enforcement, there continue to be bitter memories and internal recriminations surrounding federal involvement in the Branch Davidian (a Seventh-day Adventist offshoot) fiasco in Waco, Texas in 1993.  It's unlikely you will see such a direct and heavy-handed federal approach to "save the children" ever again. 

To any deeply religious person:  as a general rule of thumb, if you should happen to find yourself on church property typically referred to as a "compound," consider it a sign to get yourself gone.  Now.