[Useless]

I would hunt him down and inject maggots in to his anus with a turkey baster. But I've never been known to be a pro at conflict resolution.

My biggest concern would be assuring your host that the accuser is a complete nut job making libelous attacks in an attempt to eliminate his competition. It wouldn't hurt if you sent your host the link to this thread. I'd leave out the part with the maggots and the turkey baster though.