Dennis Rader, aka the BTK killer, was particularly known for sending taunting letters to police and newspapers. There were several communications from BTK during 1974 to 1979. This is a  sample of one of his letters:

The victims are tie up-most have been women-phone cut- bring some bondage mater sadist tendencies-no struggle, outside the death spot-no wintness except the Vain’s Kids. They were very lucky; a phone call save them. I was go-ng to tape the boys and put plastics bag over there head like I did Joseph, and Shirley. And then hang the girl. God-oh God what a beautiful sexual relief that would been. Josephine, when I hung her really turn me on; her pleading for mercy then the rope took whole, she helpless; staring at me with wide terror fill eyes the rope getting tighter-tighter.