I think all the details are in the thread above (
Men's Team Sabre), but basically, Keeth stepped out (twice) before Poz started his attack. Judge raised his hand and called a stop to action, so Keeth stopped. Poz touched him, but it didn't count (Keeth was saying, He told me to stop, so I stopped).
There have been some comments about one or more Russians leaving the box. AFAIK, if this did happen, it didn't affect the outcome of the point.