Date of Birth: 
About David Kaczynski
- David Kaczynski (born October 3, 1949) is the younger brother of Ted Kaczynski.
- His memoir, Every Last Tie: The Story of the Unabomber and His Family, details David's relationship with his brother and parents, and the difficult decision that David and his wife faced when they came to suspect that Ted was the Unabomber.
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