The Brief:A 37-year-old man has been arrested on suspicion of intentionally starting the Old Trails Fire in Spokane County. Investigators say the wildfire has burned more than 3,600 acres and destroyed hundreds of structures, though the suspect is not believed to be linked to two other major fires. Authorities have not identified a motive, and all three major Spokane County wildfires remain 0% contained. SPOKANE, Wash. - A 37-year-old man was arrested on suspicion of first-degree arson for allegedly starting the Old Trails Fire, one of three wildfires in Spokane County that have destroyed hundreds of homes. The suspect is...