https://bpdfamily.com/message_board/index.php?action=pm;sa=send;u=67110 is the link to send a private message to the Grand Poobah - he'll help you close the account and delete your old posts if it's necessary
Best of luck with your son, feel free to come back in the future if it would be helpful - you can always register a fake eMail address at guerrillamail.com or 10minutemail.com so it cannot be traced to you - and speak in vague enough terms that nobody will know it's you. I know it will be difficult, know that many of us send you positive vibes and prayers.