a young forensic scientists, larry peterson, took a look.hy was that a fiber that was stuck in the crack of a shoe, why was that important? >> because it was somewhat loosely there. people normally don't have tufts of carpet fibers stuck loosely in their shoe. >> from those few thin threads, peterson would begin to build a case to try to catch a killer. how many fibers across the board did you look at every day in this case, when the case really started getting busy? 100? 500? 1,000? >> literally there's going to be hundreds if not thousands of fibers there, depending upon the case. >> in the spring of 1980, no one wanted to believe a serial killer was loose in the city, even when bob buffington spotted a disturbing pattern. >> there had been a sharp increase in the number of children under the age of 14 who had been killed. >> when he told his boss at homicide, the major threatened to transfer him. >> and i truly think that they were afraid that there would be a panic. >> it was this mother, after the loss of her 9-year-old son, who finally

congressman peterson and his republican counterpart have come together on the ag part of it. larry, can i ask a question? this overall discussion of this modest agreement, when you bring people together, it is tough. nobody is ever totally satisfied. what item or what issue or what funding mechanism was not in this bill, this agreement yesterday of ryan and murray, that you think could have been added with bipartisan support? >> i do not know enough about the specifics of the agreement. i am six years removed from that. i could not give you an answer there. >> i do not know. >> this agreement yesterday, i think it is foretelling of the future. maybe the boat has sailed on medicare and social security. but this is an historic agreement. this is a good agreement for the country, i believe. when you're trying to put a package together, you form the coalition of things you can agree upon. i do not know there is an issue not extending unemployment benefits, that was an issue, right? not tax reform. there are things you could have added to bring more democratic support or more republican