He was said to have been following a facebook support group for specifically Morgan Harrington's search, according to what was posted by those who had access to his facebook page. That struck me when I first learned of it as perhaps giving him a good internet search history cover for learning more. Now, that I realize the deluge of information available about SK's on the web, and if this information is credible, then in he may have been compelled to check it out. He may have made a point of staying informed on the case, friending local women on the site, which sounds brazen. (according to the same sources)
IK followed his crimes on the internet and posted occasionally on forums, blogs, and msm article comment sections. IK utilized library PCs..
http://murderpedia.org/male.K/k/keyes-israel.htm