As the harvest season begins hitting its peak, an investigation into a fatal explosion and fire at Didion Milling’s corn processing plant has revealed few details about the cause of the disaster. The beginning of October will mark four months since the explosion and fire that killed five employees and injured 11 others, sending victims to hospitals across the region. Officials have yet to determine the cause of the explosion or comment on the potential for civil or criminal liability. The investigation into the May 31 incident that leveled much of the sprawling facility has been a cross-discipline, multi-jurisdiction effort involving local authorities, the Wisconsin Department of Justice’s Division of Criminal Investigation, the State Fire Marshal and federal Occupational Safety and Health Administration.