Last year, two on-duty Columbia police officers engaged in a bizarre shit-talking match with a seventeen-year-old who happened to be filming them with a smartphone. Newly obtained body camera footage shows the exchange from the officers' perspectives — an incident that begins with Sergeant Roger Schlude whipping out his pistol. Obtained last week by watchdog group Citizens for Justice, the videos stem from a March 7, 2015, incident on a residential street in Columbia, Missouri.…