I really don't know. Like most of the Moderators I don't really know him personally and for the most part have little contact with them unless they need my assistance with some problem on their forum. In his case we've not really swapped PMs or e-mail in a really long time. Looking at his profile I see he hasn't logged in for quite some while:
Last Active: February 19, 2008, 02:34:44 PM
I don't have any idea why or what might be going on. Sorry.