I am praying for D also. May Christ protect him and cause him to be a light for other Muslims to find their way to Christ in Orthodoxy.
I lived in that part of the world for 8 years, and I am all too familiar withwhat could happen if someone is suspected of apostazing from Islam.
Peter, if your friend D ever needs material explaining Christianity against false Muslim claims, here is a web site that I am associated hith. It also has a large section of converts from Islam to Christianity testamonies:www.answering-islam.org
The prayers of the Mother of God be with him.