To this day, media accounts claim Sicknick was “slain” on Jan. 6, and powerful Democrats, including Joe Biden, Kamala Harris and Nancy Pelosi have continued to cite his death as evidence of a “deadly insurrection” at the Capitol that day. But hitherto unseen surveillance footage from inside the Capitol, aired by Fox News host Tucker Carlson Monday night contradicts that claim. It shows Officer Sicknick walking through the building “after he was supposedly murdered by the mob outside.”Electronic bookmarks archived on the Capitol database show that the Jan. 6 committee examined the same footage of a healthy Sicknick walking around...