Someone spotted it the year before he was caught:

   The Unabomber is a mathematician.

   His so-called manifesto is freely available on the Internet at
"http://pathfinder.com" as a 221,188-byte file of HTML text  with
NUMBERED paragraphs.

   The mathematical Unabomber writes in paragaph 17 of  "rational
calculation," and in paragraph 39 of "the pursuit of goal X."  In
paragraph 57, the mad bomber speaks of "a new, ordered community"
which a non-mathematician would have called an orderly community.
In paragraph 99, the cowardly killer writes, "Think of history as
being the sum of two components...."  (Think, rather, of the Una-
bomber as being a mathematician who uses perhaps a permutation of
his own national identification  number as an authentication code
in dealing with The New York Times.)   The mathematical psychotic
continues in paragraph 143:   "In the past, human nature has been
approximately  constant, or at any rate  has varied  only  within
certain bounds."  Q.E.D.