Book excerpt: Something at the Texas detention facility is terribly wrong, and Tony Hefner knows it. But the guards are repeatedly instructed not to speak of anything they witness. In the Rio Grande Valley, one of the most poverty-stricken areas in the United States, good jobs are scarce and the detention facility pays the best wages for a hundred miles. The guards follow orders and keep quiet. For six years, Tony Hefner was a security guard at the Port Isabel Service Processing Center, one of the largest immigration detention centers in America, and witnessed alarming corruption and violations of basic human rights. Officers preyed upon the very people whom they are sworn to protect. On behalf of the 1,100 men, women, and children residing there on an average day, and the 1,500 new undocumented immigrants who pass through its walls every month, this is the story of the systematic sexual, physical, financial, and drug-related abuses of detainees by guards.