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 forced police to listen, but not until almost a year after her boy died. camille bell and her children lived in these project apartments. poor to the eye, but rich in mind and spirit. yusef bell was an honor student