Got a phone call today, left no message. It's kind of scary because it's the Cook County Commisioner. If I did something wrong, you'd think they would leave a message. I called back and it was a switchboard operator who told me any county office could have called.
It is the Cook County State's Attorney Office. My experience is that they call for a legitimate reason, i.e., it is not a prank call or a telemarketing call.
I just received and missed 10 very quick calls in a row from this number to my cell phone, which is a Orlando Florida number. Moments before I received the 10 calls to my cell I was on a business call from Chicago on my office phone (also in Orlando) . Very strange. I called back and got the general Cook County voicemail receptionist. No way of knowing why they called.