Article continues below advertisementA man has been found guilty on assault charges after Donald Trump's son reported him to U.K. authorities. Per reports, 22-year-old Russian citizen Matvei Rumiantsev was convicted on Wednesday, January 28, after standing trial for attacking his ex-girlfriend. The unnamed London woman, also 22, told the court that Barron Trump, 19, "saved" her life by contacting police when he witnessed Matvei battering her during a FaceTime call on January 18, 2025.