VINCENNES, Ind. (We Are Knox County) - The Indiana Department of Homeland Security is asking for the public’s help following a fire in Knox County earlier this week. IDHS is investigating a vehicle fire that occurred in Vincennes on Tuesday, February 3. An exact location of the fire was not released. Investigators are seeking information about the owner of a vehicle seen in the area. The vehicle is described as a white Ford pickup truck with a toolbox and a fuel tank mounted