washington post has after that it was made, to fbi agents interviewed the caller who was ben bennett the next day.they checked the law enforcement data for anyone by cruz's name but could not identify the person who left the comments. when you say you can only do so much. >> guest: there are three levels of an investigative steps the fbi can do. in itthis case the caller, he called and i think from you said mississippi. that's an assessment. the opfbi can use public databases or fbi databases, law enforcement databases to run that name or run that handle or to run anything that can hopefully identify who cruz was. by doing this, they can see if there have been similar reports on a person named cruz who's already been identified and that would give the investigators more to delve into when they are doingtheir investigation but without any real concrete information , and i've seen this in investigations i've had where people make very generic, bland threats , but they don't identify which tunnel, what plan or where or how, there's not a lot the fbi can do. i think the fbi did everythin