Tyson Foods pleaded guilty in U.S. District Court in Arkansas on January 6, 2008 and agreed to pay a fine of $500,000 for violating worker safety regulations that led to a worker’s death in its River Valley Animal Foods plant in Texarkana, Ark. A maintenance employee at the plant died in October 2003 after he was overcome with hydrogen sulfide gas while repairing a leak from a hydrolyzer. The company will also serve one year probation.