I'm not really involved in many other counts (Asch may get involved with the police force thought that comes later) but as for cooperation between baddies and the police force, I like the idea of there being a com where these things are kept up to date -- maybe require the criminal to fill out a form and post it there? Say when happened, when, where, who the victim(s) is/are, whatever evidence there is, who if anyone discovered and reported the crime, etc. etc.

There should also be clear distinctions (in the form of entry tags?) between solved crimes, cases that were closed without their being a conclusion due to lack of evidence or whatever, crimes in the process of being solved, rumors, and crimes that were never reported or discovered, so police and villains alike aren't confused as to what got discovered and how.