Keith Hunter Jesperson | The Smiley Face Killer

A Canadian-American serial killer who murdered at least eight women in the United States during the early 1990s. He was known as the "Happy Face Killer" because he drew smiley faces on his many letters to the media and prosecutors.

Source:
https://people.com/where-is-keith-hunter-jesperson-now-happy-face-killer-11691801
https://people.com/where-is-melissa-moore-now-11691809
https://www.bbc.com/news/magazine-29835159
http://murderpedia.org/male.J/j/jesperson.htm