I would let him come get his stuff and either while he's there have a conversation about a letter of intent. Or you can text him information about a letter of intent.
I would not ask him to go to breakfast to discuss things -- because honestly, I don't think that a)he has the answers and b)he has answers that would satisfy you.
Something I've learned in my life (but haven't been able to apply fully) is that you have to learn to accept the apology you're never going to get.
Let some time pass (months probably) and re-evaluate if you need to have these questions answered. You may find in time that the answers don't matter. And if they do? Enough time has passed where you two can approach it when you're not caught in the middle of it.
M:32,H 32 T:10, M5 BD/H Move Out: 9/2014 - extreme anger H Mental Illness Diagnosis: 4/15 Served D Papers: 10/15 Divorced: 11/15