According to court records filed Wednesday in Spokane County Superior Court, Aaron Farinacci was arrested and charged following an investigation into the fast-moving Old Trails fire. Detectives with the Spokane County Sheriff’s Office stated in an affidavit of facts that probable cause exists to hold Farinacci responsible for the catastrophic wildfire, as well as a series of serial arson incidents dating back to July 2025. By Aug. 2, the Old Trails fire had swept through roughly 3,200 acres near Old Trails Road and Euclid Road, destroying more than 400 structures and remaining at zero percent containment. Authorities say Farinacci monitored weather conditions through a wildfire tracking app and intentionally selected days with severe weather warnings, court documents show. He remains in custody as formal court proceedings move forward in Spokane County Superior Court.