>> on the morning of april 19th, we get the call there's been a terrible bombing in oklahoma city. so we're really focused on this at this point, because everybody's going to be asking is this the unabomber? and we gave our best assessment then that we didn't think it was because these are different personalities. these are different types of bombings. one is specific targeted, the other is a mass murder. >> any thought the unabomber was responsible for oklahoma city was quickly erased when timothy mcveigh was arrested two days after the blast. ted kaczynski, it seems, had his own agenda and his own timetable. >> when the oklahoma city bombing was happening, theodore kaczynski was already on a bus on his way to deliver the package for sending to his next victim. >> on april 24th, just five days after oklahoma city, a mail bomb killed gilbert murray, president of the california forest