you see them as a unique individual. >> david kaczynski had worried about his estranged brother for many years, but never dreamed that he would be dangerous to anyone but himself. >> certainly the family suspected him of being mentally ill, but to take that next step and say he may be someone who is murdering people, they couldn't see it. so along comes his sister-in-law, who sees him much differently, as someone who could be dangerous. >> every other day. it seemed as though there was an article about the unabomber, someone who hated technology, someone who had some kind of carpentry skills perhaps, and then places where the bombs went off: san francisco, chicago. it sounded like david's brother, ted. >> she said, "david, do you think there's any possibility, even a remote possibility, that your brother, ted, could be this unabomber that everybody is