When the Church of Jesus Christ of Latter Day Saints (aka the Mormon Church, aka LDS) shunned polygamy, some members left and formed the spin-off Fundamentalist Church of Jesus Christ of Latter Day Saints (aka FLDS), which continued to practice polygamy. A large number of them have been living on a large ranch in Texas.
Recently, Texas law enforcement raided the ranch and removed over 400 children. Here is an interview with three women from FLDS who want their children back:
Oh, and here's that former FLDS member who recorded a statement in that video talking about her escape [YouTube]. It's pretty intense. The summary of her autobiography is worth a read, too.