 Before the publication of the manifesto , Ted Kaczynski 's brother , David Kaczynski , was encouraged by his wife Linda to follow up on suspicions that Ted was the Unabomber . David Kaczynski was at first dismissive , but progressively began to take the likelihood more seriously after reading the manifesto a week after it was published in September 1995 . David Kaczynski browsed through old family papers and found letters dating back to the 1970s written by Ted and sent to newspapers protesting the abuses of technology and which contained phrasing similar to what was found in the Unabomber Manifesto . 
