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.This letter is signed by Kristen, not one of the other female monikers he's known to use. 

Three page handwritten letter dated December 26, 2005 and hand signed, Happy New Year Love, Kristen.
Includes the original prison stamped mailing envelope postmarked Dec 28 2005 hand signed, Clark.