That is interesting, so he had some interest at some point to teach in Colorado and inquired about it. I wonder what the date was that the file was opened? Was it before JonBenet's death? (Colorado DA knows for sure)
Who's not to say that he was considering working in Boulder, he may have been living in his car or staying with a Colorado pedophile friend of his (this pedophile buddy of his would never come forth to verify that Karr was in Colorado) before JonBenet's death.
Sandrock claims that Karr has ID unusual things about Boulder landmarks in his emails to help possible prove to Sandrock that he had been in Boulder at some point, including what type of brick was used to on the building that Sandrock worked in. (I don't have a link to this info but during a interview Sandrock did for MSNBC he spoke about it)
The article is very vague, and I would like to know when, too. But that was the first indication I found (others are now saying they have reason to believe he was in Boulder, but then, that was the first I found).