1) If the other party didnt report, am I off the hook even though the cops know I hit and ran?
2) If the other party did report it, shouldnt I have been contacted by their insurance already?
3) Is there a possibility that the other party didnt report/lack of witness evidence, and the investigator came to my house purely based on my collision report to make me confess?
4) What type of solid evidence do the police need to charge me? Did I do the right thing by not showing my license to the investigator?
5) Can I be convicted under the criminal code if there were no injuries?
Any helpful feedback is appreciated.
2) No. They'd obtain a copy of the accident report and bill your insurance company.
3) Very unlikely.
4) I don't see how it benefits you since they already have your information on the accident report. If anything being a jerk to the investigating officer would probably make it more likely he'll try and charge you.
5) Yes. Section 252 states you must stop and give name/address.