Published: Aug 22, 2010 8:20 PM EDT
Updated: Aug 22, 2010 5:20 PM EDT

WASHINGTON (AP) - A Seattle attorney representing some of the 1,300 people sickened by salmonella says "you have to wonder where the USDA and FDA inspectors were."

Two Iowa farms that together recalled more than half a billion potentially tainted eggs share close ties, including suppliers of chickens and feed.
      
Both are linked to businessman Austin "Jack" DeCoster. He's been cited for numerous health, safety and employment violations over the years.
      
DeCoster owns Wright County Egg, the original farm that recalled 380 million eggs after they were linked to more than 1,000 reported cases of salmonella poisoning. He also owns the company Quality Egg, which supplies young chickens and feed to a second farm that recalled another 170 million eggs.

But so far, the source of the outbreaks remains a mystery that the Food and Drug Administration is working to unravel.