A Washington, DC, police officer has corroborated to the House select committee investigating January 6, details regarding a heated exchange former President Donald Trump had with his Secret Service detail when he was told he could not go to the US Capitol after his rally, a source familiar with the matter tells CNN. The officer with the Metropolitan Police Department was in the motorcade with the Secret Service for Trump on January 6 and recounted what was seen to committee investigators, according to the source. A spokesperson for the committee declined to comment. A spokesperson for Metropolitan Police Department did not immediately respond to comment. #EvanPerez #erinburnettoutfront #CNN