The FBI and Justice Department are looking into 'significant felony cases tied to sedition and conspiracy' after the riot and siege of the US Capitol.<br />Business Insider reports the acting US attorney said Tuesday that the 'scope and scale' of the Capitol riot probe is unprecedented in FBI and DOJ history.<br />Michael Sherwin said his office has opened more than 170 subject files so far and charged 70 cases.<br />Furthermore, Business Insider reports Sherwin said prosecutors expect that number to 'grow into the hundreds.'<br />He added that there were 'thousands of potential witnesses' and 'hundreds' of potential cases that could arise as a result.