Texas ? It was no secret that a polygamist sect that built a compound in the West Texas desert believed in marrying off underage girls to older men. And the sheriff had an informant for four years who was feeding him information about life inside the sect.

But authorities say their hands were tied until last week, when they finally obtained the legal grounds to move against the group.

The trigger for the raid was a hushed phone call from a terrified 16-year-old girl to a family-violence shelter to report that her 50-year-old husband had beaten and raped her. State troopers put into action the plan they had on the shelf to enter the 1,700-acre compound, and 416 children, most of them girls, were swept into state custody because of suspicions that they were being sexually and physically abused.