SAN ANGELO, Texas AP-For four frustrating years, an informant fed Sheriff David Doran information about the polygamist sect that built a compound in the West Texas desert not far from his office in Eldorado.

But those milling about the 1,700-acre compound would scatter whenever he and a Texas Ranger visited, leaving them without the concrete evidence they needed to open a criminal investigation, Doran said Thursday as authorities defended their decision to leave the sect alone after it moved in 2004.