Surveillance video footage reviewed by The Washington Post shows that Latham visited the elections office twice that day, staying for more than four hours in total. She greeted the businessman, Scott Hall, when he arrived and led him into a back area to meet the experts and local officials, the video shows. Over the course of the day, it shows, she moved in and out of an area where the experts from the data forensics firm, SullivanStrickler, were working, a part of that building that was not visible to the surveillance camera.