Slain soldier spoke of his deathHe was filled with foreboding on recent visit home, family says.By YONIKA WILLISTribune Staff Writer Joyce Adcock, of rural Goshen, reflects Monday on the life of her son, Staff Sgt. Marvin Lee Trost III, who was killed in Iraq early Sunday morning when an individual explosive device struck his vehicle.Tribune photo/JIM RIDER Trost Staff Sgt. Marvin Lee Trost III, seen here with his wife and children in a photo provided by his family, was killed in Iraq Sunday when an individual explosive device struck his vehicle. His wife, Sherry, sons Levin, 3; and Gabriel, 3...