. >> david kaczynski's wife was on sabbatical in paris and saw excerpts from the manifesto. she recognized the phrasing because david had showed her letters from ted and told her about ted's preoccupations. >> i think it's partly that the voice in the manifesto is a chicago voice. phrases or just the grammar, perhaps. >> the kaczynski brothers have been estranged for several years. when david reads the manifesto, he must confront a sobering realization. >> david recognized in the manifesto echoes of his brother's wording. david said the one thing that really struck him was seeing the term "cool-headed logician." he said that's directly out of ted's mouth. there was a strain of ted's philosophy in every paragraph. it was becoming impossible for them to not push it further. >> through a lawyer, david kaczynski contacts the fbi. he submits the copy of an essay ted had written in 1971 to compare to the manifesto. >> it was very clear to me by the third paragraph, that what i was reading, which was a 1971 essay was identical in many ways to the manifesto. the biggest problem for d