Aha! Thanks. I hadn't understood that his actions had been so serious or so long-standing. Of course, I'm now wondering why the police hadn't been called in long before, and why he hadn't already been banned by this convention and other ones. I think, however, that I'll be better off continuing to wonder.

And mayhap my confidence in the ConCom of this convention was overly-influenced by my admiration for the people who put on the earlier ones. I do note, however, that I've worked on enough conventions to know how easy it is for something like a letter or even the fact of a serious complaint to get mislaid between one year and the next.