"To know one, you have to know all" - Truddi Chase.

You might try http://www.manyvoicespress.com/ ... she might be able to give you the name of a reasonable therapist local to him.

One of those gentlemen needs to tell the wife "listen, it may not be MPD (although he knows it is), but something is wrong and I need help".

By the way, trigger warnings are unnecessary here; you can lay it all out on the line.