A 56-year-old Cudahy man was killed in a Tuesday morning car/tractor accident in Fond du Lac County, according to the Fond du Lac Reporter. Mark Heller was killed when a tractor pulling a feed wagon turned in front of him on County Highway AW. Heller was the son of former Fond du Lac police chief and current Fond du Lac County supervisor Mel Heller, according to the Reporter.