Didnt call his parents yet. Im not from US, so a call is kinda expensive and time wasting. Im also no native speaker, so its kinda difficult to explain his parents what their son did, perhaps explaining bitcoins ... Not really worth 11 BTC even if its now 1.5% compounding daily.
Part of the doxing (did I use that word correctly?) that you did is an overdue electric bill saying that if they don't pay $400, the electricity will be shut off. I'm guessing the kid's parent(s) have more pressing creditors to satisfy before they get around to that guy on the internet.
Anyways...I hope it works out for you.