Robert Diaz deceased nurse / serial killer who murdered at least 12 of his patients by overdosing them with drugs.
Diaz died in August 2010 while awaiting execution.

Christmas card sent from death row with a handwritten message on the inside and hand signed, Bob. 
Includes the original prison stamped mailing envelope completely written by Diaz and hand signed, Robert R. Diaz.

Robert Diaz Card And Envelope Both Signed