Hadden Irving Clark, serial killer suspected of murders in several northeastern states. Serving a life sentence for a murder conviction in Maryland. Hadden is known to use many female aliases but his most well known is Kristen. 

This letter is signed by Kristen, not one of the other female monikers he's known to use. Four page handwritten letter dated, 17 August 2003 and hand signed, You take care, Hadden.
Includes the original prison stamped mailing envelope postmarked Aug 18 2003 and hand signed, Clark.

Hadden Clark Signed Letter and Envelope Set