(McMinnville, OR)  --  Police say they've tracked down the truck involved in a fatal hit and run near McMinnville  on Saturday.  Police say the truck was seized by the Yamhill [[ YAM'-hill ]] County Sheriff's Office.  The body of 56-year-old Ricardo Morales Avila, of Salem, was found in a ditch on Durham Lane near Highway 18.  He was working as a grounds keeper at a nearby business when he as hit.  He died at the scene.  Investigators have not made an arrest in the case.