confusing yet meticulously crafted collar bomb, even the white t-shirt brian wells wore into the bank, spray painted with the word guess. to fisherof it hatched in the mind of a madman. >> there is a kind of motive we can understand. like a standard bank robbery. someone needs the money. and then we have a category of crime involving an immoral person you can't really understand. >> you're describing billirothstebillirot billirothstein. he fits to a tee someone who would design such a pathological crime. >> four years after the original crime, the government had to prove in court, its theory was correct. and there were two big problems. rothstein, the alleged mastermind, died, before even officially being linked to the crime. and the other main suspect, marjorie diehl armstrong, had told so many lies, she was showing evidence of mental problems and a personality disorder. >> the mental illness was a 30-year history. the personality disorders were a 30-year history. >> over many delays and many more years, the government finally obtained convictions on charges of bank robbery and murder. life plus 30 years for marjorie diehl armst