The Ole' Mercantile is a busy place by Grass Range, Montana, standards. The community of roughly 125 people sits along a long, lonely network of two-lane highways connecting Billings with points north along Montana’s Hi-Line. For drivers pushing toward Lewistown, Malta or Glasgow, the store's lights are often the first sign of anything for miles. Of late, they may also offer a chance of identifying the person driving a truck local women say is stalking these roads.