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" drawing of a girl holding a sign that reads, "I love Bobby" with a larger drawing of a boy inside of a heart holding another heart that reads, "Kristen's my sweetheart."
 
Clark has written, "I know your thinking of me. Be my valentine."
Hand signed with his female moniker, Love, Kristen.
 
Items signed by Clark using his female moniker, Kristen, and Kristen Bluefin are considered scarce.