Four of the fires that Aaron Farinacci, 37, confessed to starting have been corroborated by detectives, prosecutors said. The criminal charges “may be further amended as the full extent of the defendant’s criminal acts becomes known,” prosecutors said. started a fire,’” said Paul Child, who lives less than half a mile from where investigators say the fire started. But then he described “in detail his planning and execution” of starting the Old Trails Fire, prosecutors say. Within an hour, the officer told Child that deputies had detained a person who matched the description he gave, the grandfather said.