This is a letter from the Slave Master serial killer, John Edward Robinson. In 2003, John Robinson was convicted of three murders in Kansas, receiving two death sentences. In 2005, he plead guilty to five additional murders in Missouri. Robinson frequented BDSM chatrooms often, where he would meet most of his victims. It's unclear how many additional murders Robinson may have under his belt.
The envelope has Robinson’s hand signature, however, the letter is unsigned, although it is handwritten. The letter contains some very interesting content. He specifically mentions murderabilia in this letter!
COA included
