reporter: according to the irs investigators, hastert regularly withdrew just under $10,000 in cash to give to his former student. the continued abhorrence to this financial cap was a crime that raised suspicion at the highest level. hob yobviously there is conc for him. there is concern for a country that could be compromised. we had to ask him. that was our last effort to find out why. agents invited him into their home and promptly asked for an explanation. he said he didn t trust banks and then ultimately it was revealed that he was claiming to be extorted by individuals. reporter: hastert s attorney then claimed a former student was blackmailing the politician with false accusations of abuse. i never thought i would have to ask the former speaker, have