Vancouver Washington police say it appears Tuan Dao, 37,set a fire to his home killing himself and five of his children: Nolan, Jacob, Noah, Samantha and Nathan Dao. Kapp says they're continuing to investigate Dao's activities in the days leading up to the fire to determine motive. His wife and oldest daughter were living somewhere else and are the only surviving family members. It is believed that Dao was depressed about financial matters and his crumbling marriage.