FAIRVIEW HEIGHTS — Federal prosecutors said a U.S. Marshals Service-led warrant enforcement operation in Southern Illinois over three days resulted in 21 arrests and the seizure of four firearms and 12 grams of narcotics, targeting violent fugitives with felony warrants and identifying gang members in the district’s southern counties.The U.S. Attorney’s Office for the Southern District of Illinois announced the results today, describing the coordinated effort as carried out by ...