WR, You can't reason w/someone who is irrational. If he responds again, advise him that it is in your lawyer's hands and that your lawyer will be responding. End of story...don't get into a text match w/him. If he wants to find out anything more, he can contact your lawyer himself and get shot down.
You are paying good money for a lawyer to represent you...let that lawyer deal w/his lawyer on this.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.