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 hand dated January 12, 2003, hand signed, God Bless you always, Kristen. Includes the original prison stamped mailing envelope postmarked January 12, 2003 with full color artwork girls on both sides. Completely written by Hadden, hand signed, Clark.