Occasionally, when retired life gets boring, I like to play little games, to see who (cops?) pops up. I, basically invite email that no one would want. My methods are my own. I don't/won't reveal them on ANY forum. Been a very good while since I've had one that was surprising, even had a facebook page.
Getting a call out of the clear blue sky, however, is a different story. I knew of a KC cop who would send emails to people out of the blue. No doubt, you did the right thing!
You had your big head screwed on right! It is a good thing to pass on your suspicions, a lot here would not, just let it go!