The uniformed guy showed me a badge. The other one showed me a card. I didn't get a close look because my porch light is out, and I was scared.
I don't use a cane because the leg problem comes and goes, depending on how active I've been.
A friend and neighbor who is a legal secretary is getting me the number of a good lawyer. (Her son has had some difficulties so she knows a good one.) I just emailed a friend who was a police officer in Evanston to get his opinion.

I live, for my sins, in the borough of Swissvale. It's a blue collar suburb that grew up around a Union Switch and Signal plant that isn't there anymore. A couple of years ago, the local constabulary killed a drunk with a tazer. Which makes me leery of them. But they wouldn't like somebody dressing up and playing cop. Police generally don't.
And I'm sure Arby's has security cameras. They should have pictures of the woman.