In the TV show Mindhunter there is a nerdy looking guy who appears briefly before every episode starts (or most episode starts). He is seen showing some eccentric and anti-social behaviors.
How is he related to the plot?
I have this feeling that they are building up suspense for season 2 or even season 3, but I want to be sure.
This TV show is relatively realistic, a few murderers from it are based on actual murderers, is this mysterious nerdy guy one of actual murderers?