>> of all the cases i've ever worked, particularly to the bombing community, almost always there's some type of motive found. may take awhile to find it like with the unabomber, ted kaczniski, but there's almost always a motive. the case is not over yet by any means. just starting with the search, his life will have to be matrixed out as far as any other associated or what other influences he's had that could have caused him to go to these lengths. >> neil: and we know that initially the lengths, at least in the very beginning, involved dropping packages at two key individual's homes. so that was by design. the homes were a target. that are we to make of that now? with the trip wire later on that widened this probe out. what are you to make of that?