Having gone thru a few tragedies with friends who lost children, I can only imagine what lies ahead for your friend...his wife...their marriage.
Prayerfully, the child is bouncing on Christ's knee and laughing in peace.
Prayers are for the family and the marriage.
Joe, you and their friends have a tall order to P.U.S.H (pray until something happens) to bind and bond the parents again. Stay close. Force them to share...to get counseling...and don't quit once the funeral is over...that is when the real pain starts...especially with Holidays dead on us!
This, or the self-imposed guilt, can rip the best people and relationships in two!
Lord, in your Mercy, be with these folks in this intense time of need. Amen.