The article never mention Mormon you did!
The article clearly referred to the teens as members of the Fundamentalist
Church of Jesus Christ of Latter Day Saints. As noted above, this sect
purports to believe in the Book of Mormon, the Pearl of Great Price, the Temple
Ceremony as originally handed down by Joseph Smith, and Doctrine and
Covenants (including Section 132). That is why I referred to them as Mormon. If
this is incorrect, I apologize.