Man, sorry to hear that, Dave. I am glad that you're ok.
Similar thing happened to me about 3 years ago - unlicensed, uninsured, no-legal-status van full of immigrants sideswiped me on the innerbelt in St Louie. They initially decided not to stop... I eventually persuaded them to alter that decision.
Waited for police, with my Outback blocking their van in place. The legal-status determined, they were carted off with my insurance left holding the bill.
LOTS of uninsured, inner-city folks here in (East) St. Louis too. We'll have to see about Indy.
Either way, I'm glad you're ok.