Missing ex-NFL player Sergio Brown appeared to mock reports of his disappearance in a second bizarre video days after his mother was found murdered in Illinois. Brown, 35, delivered an unhinged rant that referenced the 2003 children’s film “Finding Nemo” on his apparent burner Instagram account intplayerwithapassport, while also appearing to reference a missing persons report that was filed by family members on Saturday. “Just keep swimming, just keep swimming,” he said, repeating a mantra made famous by Ellen DeGeneres’ character, Dory, in the movie. Read more at nypost.com/2023/09/20/sergio-brown-appears-to-mock-missing-persons-report-in-new-video #sergiobrown #mexico #nfl Subscribe and don't miss out on all the key news, highlights, and interviews about the Yankees, Mets, Giants, Jets, Knicks, Nets, Rangers, Devils, Islanders and what's buzzing in the sports world too! Catch the latest news here: nypost.com/sports Follow The New York Post Sports on: Twitte...