Polygamy Law Challenged by Reality TV Show 'Sister Wives'

Reality show husband's controversial victory on polygamy in the state of Utah.
3:00 | 12/16/13

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Transcript for Polygamy Law Challenged by Reality TV Show 'Sister Wives'
controversial decision on polygamy in the state of utah. The law challenged by the family from the tv reality show "sister wives." Tonight, that husband, marking a victory. Here's abc's reena ninan. Reporter: He is the polygamist turned reality star who fled from utah to nevada with his family in 2011. Days after the tlc show "sister wives" triggered a police investigation. Love should be multiplied, not divided. Because of the circumstances, we're going to move in three days. Reporter: Brown took the state of utah to court, and tonight, his family of 22 has reason to celebrate. A federal judge in utah striking down part of the state's anti-polygamy law. Ultimately, this is a triumph for privacy and continues a trend, a good trend, in this country, of pluralism and tolerance. Reporter: While the ruling does not legalize multiple marriages, it means polygamist families who live together but don't seek multiple marriage licenses cannot be prosecuted. She's a sister from the same mister and he's a brother from another mother. Reporter: They were open about their lifestyle while living in utah with his four wives and 17 children. The browns now live in nevada. Kody weighing in on the verdict. "We hope that in time all of our neighbors and fellow citizens will come to respect our own choices." Tonight, critics of the browns lifestyle are weighing in. "Polygamy is not a religion and government should have kept to their own business instead of making illegal. Marriage is between two." We reached out to the utah attorney general's office, david. They could appeal this case. We'll find out more this week. It's pbl this may not be over. Thank you, reena.

This transcript has been automatically generated and may not be 100% accurate.

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