I’d be willing to bet that he already ran the names of everyone associated with his kids at school as well as sports a long time ago.
Side note - and Yes he most likely already did.
As a hobby I modify some online game code so groups of players can run "customized" maps on local servers (not accessible to everyone on the inter-webs) and got in with a group of guys in Dallas.
Come to find out - every single one of them were U.S. Air Marshals, U.S. Marshals, Boarder Patrol, ATF, ICE - and almost to a man - each and everyone of them "checked me out" before they allowed me in to their game servers to alter the game code.
Turned out to be great guys, but very very very testosterone fueled, and honestly, I could not drink enough RedBull to live at their speed.
I still keep in touch now and then, but they honesty hold a grudge and took offense at me leaving and working with others.
But to answer the original question, with out a doubt - after the initial contact.... he already knows as much about you as you know about you.