Screenshot/ABC News

House impeachment managers are preparing for former President Donald Trump's impeachment trial by figuring out just what he and his allies were up to the morning of the Capitol riot.

Congressional investigators are wrapping up their case against Trump in the last few days before his Senate trial for allegedly inciting the insurrection begins Monday. Sources tell ABC News those investigators are "zeroing in on the actions of the president and his associates around the insurrection at the Capitol," specifically compiling social media posts and videos showing just what they were doing the morning of Jan. 6.

Among those videos is one obtained by ABC News showing Trump's friend Roger Stone in Washington, D.C., that morning. Stone is seen outside of a hotel, taking pictures with supporters while seemingly under the watch of members of the Oath Keepers militia group. At one point, a supporter asked Stone, "So, hopefully we have this today, right?" "We shall see," Stone replied.

Stone told ABC News that he had "no role whatsoever in the Jan. 6 events" and "never left the site of my hotel until leaving for Dulles Airport" later that afternoon. "I had no advance knowledge of the riot at the Capitol," and "could not even tell you the names of those who volunteered to provide security for me," he added.

Stone was convicted of several felonies as a result of the Mueller investigation, but Trump commuted his sentence last summer.