and after hours and hours of being alone wbl to find her. >> reporter: leon lebaron, one of christina'sy and the baby was smiling at us. >> reporter: the families, who have dual citizenship in both the u.s. and mexico, have lived in this border region for decades, before the cartels moved in. >> and when i first moved there, our little farm, there was a paradise, for children, for families. and we lived really safe. and had a good life. i have fond memories, really fond memories of my childhood there. >> reporter: one of the reasons why the drug cartels are so prevalent in this area is because it's incredibly remote. you can see behind me it's all mountains and there aren't too many police officers sort of guard this area. and that's why the cartels feel they can run rampant here and do whatever they want. mormons have a long history in mexico. christina rosetti studies the religion. >> so starting in the 1890s mormons began moving t tora re practiceygamy and those that do are not associated with the lds church in the u.s. now david says he's left with no choice but to leave. >> not onl