I've spent a lot of time reading about this case through the years and this guy's personality certainly fits. It also screams Internet forum user. Early/mid 90'

I've spent a lot of time reading about this case through the years and this guy's personality certainly fits. It also screams Internet forum user. Early/mid 90's this guy would've been mid/late 60s. Might be a stretch but it's possible he was online. I wonder if his daughter could comment on whether or not he had an email address or used a PC. The guy spent so much time writing letters and reading esoteric stuff he surely would've posted like crazy. Might be more clues there.