I don't think he ever said that. I think he made some general threat to the woman that made reference to the kid, and then people quickly ran with that to interpret it as him saying that he would do to her what he did to the kid, thereby indirectly implying he broke the kids arm. At least it seemed like there could be enough smoke generated from this tape to justify kicking him out of the league to send the all-important proper social message. I think now the feeling is that the interpretation of what he was talking about is flawed.
It sounds like this has come down to where he simply threatened her during an argument. Not enough smoke to suspend him, IMO.