I finally got a hold of him after much effort, and he sheepishly told me that he just wasn't that dedicated, and that we should find someone else who is more committed. I guess a good way to describe Mitch is someone who has absolutely no drive towards anything in life. He played well with us, but, to him, it was nothing more than a convenient hobby. It's a shame, but at least this shit comes out now instead of later.
So now, I am on the lookout for both a new bass player and drummer. I have been inserting ads on Gumtree. I have received a couple of replies. So, that's good. Let's hope for the best.