U.S. Attorney Booth Goodwin, right, speaks with an unidentified person at the Freedom Industries site on Barlow Drive, Tuesday, Jan. 28, 2014, in Charleston, W.Va. Goodwin said members of the FBI Hazardous Materials Response Unit are in the process of collecting documents, interviewing witnesses and collecting photographic evidence inside the tank that leaked Crude MCHM and PPH on Thursday, Jan. 9.