Robert Lee Yates is a Spokane, Washington serial killer who is known to have murdered at least 16 women and possibly more.

8 1/2" x 11" six page handwritten double sided letter on 3 sheets of white lined paper with a hand drawn smiley face at the beginning of the letter.
Hand signed at the close, Robert. 
Includes the original prison stamped envelope postmarked September 26, 2015 which has ben completely written by Yates includes a religious sentence on the front. 
Hand signed, Robert L Yates.