(AP) — Food safety advocates say a guilty verdict in a rare federal food-poisoning trial should send a stern warning to others who may be tempted to place profits over people's welfare. More than five years after hundreds of Americans got sick from eating salmonella-tainted peanut butter, the top executive at the Georgia plant where it was made was convicted Friday of conspiracy, obstruction of justice, wire fraud and other crimes related the nationwide outbreak in 2008 and 2009. Former Peanut Corporation of America owner Stewart Parnell, 60, could face more than three decades in prison for the outbreak linked to nine deaths and prompted one of the largest food recalls in U.S.