A serial arsonist is suspected in a rash of fires which gutted a store, a house and a trailer Saturday night on Viola Road, burning out a family while they were at the fair.The property, belonging to Bobby Jaco, sustained an estimated $200,000 worth of damage and has prompted an investigation by the Tennessee Fire Marshal’s office after evidence at the scene suggests the fires were intentionally set.Viola and Morrison firefighters were called to the scene at 10:45 p.m. Saturday after flames were seen coming from the store/ laundry located near the entrance to Mt. View Trailer Court on Viola Road (Highway 108). Firefighters found the business already engulfed in flames when they arrived and began working to douse the fire.It was during their work to subdue the store fire that someone noticed smoke pouring from the brick house about 30 yards away.