but there is just one person of interest they want to check off the list. >> several of our correspondents are being told he was working alone. >> let's begin the press conference. >> we'll follow the same order of presentation that we did earlier. i'll be followed by chief lanier, who will be followed by our fbi, washington director. and chief chambers and congresswoman norton. >> we don't have a great deal of new information to present to you. at this point. i think we mentioned earlier that we had ruled out one of the suspects as being no longer a suspect. we've continued to pursue the possibility of there being another shooter. we don't have any evidence or