Illinois' laws prohibits the recording of communications unless all parties to the conversation consent.
See my Legal Guide Recording Conversations in Illinois
Check with a lawyer in your locale to discuss more of the details. Twelve states like Illinois require all party consent to record.
Good luck to you.
Again, check with a lawyer in your locale.
NOTE: This observation is made available by the out-of-state lawyer for educational purposes only. This observation is not like a communication with a lawyer with whom you have an attorney-client relationship along with all the privileges that relationship provides.