The guy that played Kemper was so bang on. I did the same real life sourcing too. I knew I had seen the real interview before....but I found one that was side by side real life and show....and my God....it was uncanny.After I watched the first season when it came out, I youtubed a bunch of the interviews Kemper did and it was eerily spot on. Creepy.
I fucking loved it lol.
Now if we can find an actor who can perfectly play Kuklinski from the HBO interviews that would be something too.