BREAKING POLYGAMY, ON "20/20 SATURDAY"

Deep in the desert on the border between Utah and Arizona lies a hidden world within modern America. Colorado City is home to the Fundamentalist Latter Day Saints, the largest polygamous community in America. Here, a year-long investigation by ABC News reveals a town of 10,000 ruled by a man behind bars. Warren Jeffs, their leader and prophet, was sentenced to life in prison last year. But his people continue to accept his edicts as law. Over the past year, he has destroyed families by excommunicating dozens of men and women. Men, women, even teens have been forced to leave their families and the only life they have ever known.

"20/20 Saturday" follows one family -- a mother, six daughters and a son -- on their path to freedom as they struggle to survive in the outside world, a world they've been taught will be their damnation. Amy Robach's report airs on "20/20 Saturday," JANUARY 26 (10:00-11:00 p.m., ET) on the ABC Television Network. (OAD: 11/23/12)

VIDEO: Man searches for mom, sisters after dad banished by Warren Jeffs and FLDS

Carlos Holm confronted church leaders he suspected of hiding his mother and sisters.

http://abcnews.go.com/2020/video/man-searches-mom-sisters-dad-anished-warren-jeffs-17773895

http://abcn.ws/TPE2Ji

STORY: Jailed polygamist leader Warren Jeffs issues hundreds of orders from prison

http://abcnews.go.com/US/jailed-polygamist-leader-warren-jeffs-issues-hundreds-orders/story?id=17770090

http://abcn.ws/QYgya9

STORY: From prairie dresses to earrings: mother and six daughters leave Warren Jeffs' FLDS for new life

http://abcnews.go.com/US/prairie-dresses-ear-rings-mother-daughters-leave-warren/story?id=17768193

http://abcn.ws/UeUSWz

David Sloan is executive producer of "20/20".