A former Iowa egg farm manager will avoid jail time after cooperating with investigators in a criminal prosecution stemming from a 2010 salmonella outbreak.

U.S. District Judge Mark Bennett sentenced Tony Wasmund to four years of probation Tuesday after the government said he provided “substantial assistance” in the salmonella case. Bennett imposed no restitution or fine on Wasmund, of Willmar, Minnesota.

Wasmund worked for egg tycoon Jack DeCoster, whose Iowa operations caused the outbreak that prompted the recall of 550 million eggs and sickened thousands.

Under a plea deal, Wasmund pleaded guilty in 2012 to his role in bribing a U.S. Department of Agriculture inspector to allow sales of eggs that didn’t meet federal standards. He cooperated in an investigation that led to convictions of DeCoster and his son Peter.

The pair were sentenced in April 2015 to three-month terms in prison for introducing adulterated food into interstate commerce.