It looks like to me that there's some people knowing Conan's games (Seeing how the Nagano Police District seem to aquire lots of help from Conan, as if depending on him in some way) and how the Sleeping Koguro actually gets the job done. This seems a bit worrisome though. That would mean if the man with the artificial eye is the 1st Division, it's possible that he'll find out that Conan is not an ordinary kid but a pretty smart one with that too since I'm feeling that who I think is RUM is one who knows how to deduce at a very well speed, however, it doesn't mean he isn't good at making false deductions on purpose. We could see this as Hyoue Kuroda and Yamato both have some kind of past that makes them know what they've done in the past. So in Hyoue's perspective he's trying to put the blame on Yamato for a good opportunity to put blame the murders that wasn't his. Hyoue however knows who actually committed the murders possibly. This also adds that Yamato must have done something before he got a scar years ago causing the reason why Hyoue believes he's the murderer.
... but I'm not entirely sure. I just look at the raw pictures based on how the characters act and their behaviors are amongst one another. (Then I wait till they are translated so I can be sure I'm right)