He used Dan Rather's typewriter:
I know you were joking but...
You'd think having such a unique typewriter Killian would have used a less easily traceable model for his devastating ''CYA'' memo. Also, he might have chosen a font other than Times New Roman, designed for the Times of London in the 1930s and not licensed to Microsoft by Rupert Murdoch (the Times' owner) until the 1980s.
Weird coincidence, huh.