Oklahoma state Attorney General Drew Edmondson gestures as he speaks Friday, Feb. 13, 2009, at a news conference, saying that it is "highly likely" that poultry litter spread across pastures in Mayes County was the source of E. coli bacteria that contaminated well water at a restaurant in Locust Grove last year, killing one person and sickening more than 300 others. (AP Photo/Sue Ogrocki)