A Russian man has been convicted in a London court of beating a woman in a crime reported by the youngest son of U.S. President Donald Trump. Barron Trump called London police more than a year ago after witnessing a man assaulting his friend during a short video call. Matvei Rumiantsev was convicted Wednesday of assault with bodily harm but acquitted of rape and choking charges. Trump didn't testify but told police he placed a late night video call to his friend and was startled when it was answered by a bare-chested man who then turned the phone around and he could see the woman being beaten.