I don't know. But, I know that it must be something in the Kanto Region of Japan and that they seem to think they might have better access to the information by hanging around a famous detective.

I don't think it has anything to do with Kaitou Kid-the organization should have no reason to go after him since they don't know he was even involved. ...Come to think of it, he was pretty mad at me that I only mentioned in passing there might be explosives on that part of the train...

[ ...Is it possible this is all Kid's revenge? No... he wouldn't do something like that, and besides, as far as Shinichi knows, Kid never met Bourbon until just before that explosion. ]