See more. The nine U.S. citizens who were killed in a brutal ambush by drug cartel gunmen Monday while traveling in Mexico belonged to a Mormon offshoot group that has been touched by cartel violence before. Nerren and Hall's Church of Christ at Zion's Retreat-- offshoot of Nerren and Long's group ; Nerren and Gayman's Church of Israel-- white supremacist group. 12:5 and the "rod of iron" of Mormon scriptures. Offshoot definition, a branch or lateral shoot from a main stem, as of a plant. Kathryn Carter's New Jerusalem Group-- claims her son is the fulfillment of Rev.