The famous image often accompanied with the creepypasta, which predates the pasta by many years, is one of the greatest mysteries of the internet, it is famous all across the world yet no one truly knows the exact origin. Until now, it appears, because a user on /x/ recently discovered the true original image source, not unphotoshopped but an earlier version of it, uploaded in 2005!
http://pya.cc/pyaimg/pimg.php?imgid=17882
With the more famous version posted 2 months later:
http://pya.cc/pyaimg/pimg.php?imgid=20716
Also a third image which we have not yet found the source of, but we know to be legitimate as it has less edits from the original than the previous:
https://i.imgur.com/Y11UTpY.jpg
Only 2 things left to find are the original completely unphotoshopped image, and a separate image of "Jeff holding a chunk of flesh over a bathtub" which was widely circulated on the chans in 2006-2008 but has since been lost.