OK, so after talking to the teacher & the principal twice, it seems that Ethan, yes Ethan, failed to give me the full story. Imagine that, a 6 year old not telling the whole story.
Apparently, Travis accidentally hit the water bottle that Ethan was drinking out of during lunch and that was what knocked the tooth out of Ethan's mouth. In fact she said, giggling I might add, that the first thing out of Ethan's mouth was "First I have to say this was an accident."
Strike one for Ethan. I guess here comes Lecture #37, the importance of telling the truth, the whole truth and nothing but the truth.