ConAgra Grocery Products unit agrees to plead guilty to a charge that it shipped contaminated peanut butter linked to a 2006-2007 nationwide outbreak of salmonella poisoning ConAgra Grocery Products LLC, Omaha, Neb., a subsidiary of ConAgra Foods Inc., has agreed to plead guilty and pay $11.2 million in fines and forfeitures connected with the charge that it shipped contaminated peanut butter linked to a 2006-2007 nationwide outbreak of salmonella poisoning, the Department of Justice announced May 20. Manufacturing products at a facility in Sylvester, Ga., ConAgra Grocery Products signed a statement admitting that it introduced Peter Pan and private-label peanut butter contaminated with salmonella into interstate commerce during the 2006 through 2007 outbreak.