Marshalltown will be having Trick or Treat night tonight between 5:30 and 7:00 p-m. Marshalltown Police Chief Michael Tupper urges parents to be careful with their young ghosts and goblins. He says make sure they have adult supervision and carry a source of light as they go. He also urges motorists to watch out for the trick or treaters as they drive. Chief Tupper also urges parents to inspect the candy once it is brought home.