bill rothstein, marjorie diehl-armstrong.another suspect, a crack dealer named kenneth barnes. and barnes claimed brian wells was in on the plot from the beginning and that he was duped. >> wells was essentially told he would be robbing the bank, but the device that was being put around his neck would be fake so he would not be putting himself in harm's way. as it turns out, he was double-crossed. >> criminologist jim fisher believes it was rothstein who wanted to pull off the perfect diabolical crime that would baffle investigators. the elaborate scavenger hunt would send them to a dead-end. the confusing, yet meticulously crafted collar bomb, even the white t-shirt brian wells wore into the bank spray painted with the word "guess." to fisher, all of it hatched in the mind of a madman. >> the kind of motive we can understand, like a standard bank robbery, someone needs the money. then we have a category of crime involving motives that a normal person can't really understand. >> you're describing bill rothstein? >> that would