Hadden Irving Clark is an American serial killer suspected of murders in several northeastern states. Clark is currently serving life in a Maryland prison. Clark remains a suspect in other unsovled murder cases. 8 1/2" x 11" four page handwritten letter from his alter ego, Kristen, hand dated January 22, 2006, boldy hand signed, Kristen.  Includes the original prison stamped mailing envelope postmarked Jan 23 2006 completely written by Hadden, hand signed, Clark.