 On May 12, 2008, the FBI and Department of Homeland Security agents raided the plant and arrested 389 workers who had fraudulent identity documentation.At that time, it was the largest raid into a workplace in the United States.On October 30, 2008, one day after the Iowa labor commissioner fined Agriprocessors $10 million for wage violations, Rubashkin was arrested on federal conspiracy charges of harboring undocumented immigrants and aiding and abetting aggravated identity theft.