When Horatio is talking with Carson in his tent on the beach, his hands are on the arms of his deck chair when being shown the picture of the victim, but a split second later, his arms are folded across his chest, he didn't have enough time to do this.
Horatio is questioning Kip Miller about having ceramic crowns on two of his front teeth. Horatio asks him about removing them before he attacked and bit the women, so that his bite with the crowns in would not match any bite marks on the women. Horatio then knocks the crowns out of Kips mouth. This would actually be assault by Horatio upon a suspect, and as they were removed without a search warrant they and the fact that he had them would get thrown out as evidence in connection to any of Kips crimes.