I don't know what it is about him, but he really loves to take little bitty things, completely irrelevant... throw them into the debate to get me off track. Then we have pages of discussion that has NOTHING to do with evolution, but more with the percent of scientists that are Theistic.
You are not likely to convince him. However, take the whole thing as an excellent (if very, very challenging) exercise in holding on to the actual topic and keeping focussed. Do not (hard as it is) let yourself be dragged off topic.
For example: the moral issue. You may suggest that is a philosophical (or very difficult question in some other area) and that it would be very interesting to come back to it. However, that has nothing to do with the facts of geology, physics, chemistry and biology. You might suggest he stick to those things first and then, if needed come back to the philosophical implications.
If he is really hopeless then you will find that he will NOT stick it out. The reason is either that he isn't capable of handling the intellectual challenge or he is but can see, vaguely, where it is all heading and doesn't want to go there. If he follows you carefully and you stick to the topic he ends up having to undergo a gut-wrenching change in world view (but you should note strongly NOT a loss of faith) or worse? arrive at a conclusion that is god deceives in some infathomable way.
Others here who have been through it all might be able to give you more insight.
Meanwhile, use if as a mental exercise for yourself. How well can you resist the red herrings?