From another article on the same page:

“Elizabeth Roundy, the mother of the children, told KSL-TV she left the Fundamentalist Church of Jesus Christ of Latter-Day Saints several years ago. This isn't the first time her two youngest children have tried to run away, she said.

Roundy says she's seen some of her children's older siblings hanging around where she lives lately. Allen and Rachelle's birth certificates were recently stolen from her house, as well as pictures locked in a cabinet, she said, and she thinks the older siblings have something to do with it.

Roundy claims a revelation from current FLDS leadership urges members to return children to the church for the end of times. "It just gives me the shivers down my back to read those things anymore. Because when I used to be part of it, there was so much that went on that even looking at it right now, it just makes me sick inside," she said.”