I met CA once in person in 2001, when he was a prolific poster here and on other boards.
He left here of his own accord several years ago, as did many others.
I have no idea where his persona resides now.
A Google search brings up nothing under CA or his actual name since 2001, so I might presume he has changed name, and/or retired from the boards.
edited to add: I have sent you via PM his old email I had on file, (which he has posted publicly, so I'm not violating privacy or anything). It may still be valid.