By Tim SchmidtRecord Managing EditorIt took a Warren County jury less than 30 minutes to convict a St. Louis man for participating in a dogfighting ring.Ronald Christopher Nall, 48, of St. Louis, was found guilty last Thursday of two counts of felony dogfighting during a one-day jury trial held in Warren County Circuit Court.Nall, who represented himself in the trial, had pleaded not guilty to the charges. He will be sentenced Aug. 11.The dogfight occurred March 25, 2009, at a residence in the 23000 block of Laura Lane in Wright City, authorities said.Police said Nall owned a dog used in a fight at the home and then sold the dog to an undercover Missouri State Highway Patrol trooper.Nall was charged in May 2010, but was not taken into custody until February 2014 when an arrest warrant was served.The local dogfighting ring was connected to the biggest dog rescue in U.S. history in July 2009 and led to felony charges being filed against 12 suspects in Warren County.The fights were discovered by confidential informants working for state and federal agencies during a multistate investigation that lasted more than a year.Dozens of pit bull terriers were seized in 2009 from at least three Warren County properties, two of which were located on Mark Petersen Lane south of Innsbrook and one on Highway J outside of Wright City, authorities said.More than 150 dogs were rescued in multiple raids conducted in eastern Missouri in July 2009. In all, authorities seized over 400 dogs following investigations elsewhere, including Illinois, Texas, Oklahoma, Iowa and Mississippi.Ronald Nall