Roy L. Kato, his wife, Jenny R. Kato, both 34, and their 13-year-old son, Joshua Kato, were killed at about 8:35 a.m. Thursday in a two-vehicle crash near the intersection of Highway K and Decator Drive in the town of Maine, according to the Wisconsin State Patrol. Authorities said six family members were injured at the intersection of Highway N and Highway J in the town of Ringle when their 1997 Chevrolet Astro van was struck by a tractor-trailer.