Theodore John Kaczynski aka the "Unabomber" is a former mathematics professor, a domestic terrorist, and serial killer who between 1978 and 1995 killed 3 and wounded 23 others by attempting to start a nationwide combing campaign targeting people involved with modern technology.
Kaczynski was found dead in his cell on June 10, 2023.

Four page handwritten letter with excellent content! The letter is hand dated February 2, 2016 'Groundhog Day' and hand twice plus he has initialed this twice.
IInitialed at the top of pages 2 , 3 and 4, TJK. Hand signed at the top of the first page, Ted Kaczynski. Hand signed again at the close, Best Regards, Ted.

Kaczynski has inserted a sheet of paper between the letter and the back of the envelope on which he writes, "Please put this slip of paper between the letter and the back of the envelope to protect the letter from the glue. Thank you."
Includes the original prison mailed envelope with his complete return address postmarked May 7, 2015 and hand signed, Theodore John Kaczynski, with his complete return address and the recipient's written by the Unabomber.