criminal investigative decision. and sam roboti, retired agent in charge of the atf in philadelphia. art, you first. we keep getting lots of information, especially coming from these press briefings. law enforcement officials who have been briefed on this investigation told cnn on thursday that they had no knowledge of an accomplice for paddock. but then when you see sheriff lombardi in there saying we have to assume he had some help, is this a difference in terms of terminology, help versus knowing accomplice? >> it could be but it's almost like the sheriff is dropping hints. he dropped hints that there was a message left inside the suite that he was in when he started shooting. his press conferences have been somewhat confusing at times. but what's really interesting here is this case gets more complicated every single day. now we know that he, you know, scoped out other locations. you know, probably decided on this particular location because the life is beautiful concert, i think that was too close, that