the police repeatedly, and in great length, was something new. >> the psychotic killer has already murdered five. one at a lover's lane at a lake north of san francisco. three others in nearby vallejo. the latest, a taxi driver in search. the zodiac killer seems to crave publicity. he sent letters and cryptograms to newspapers and the police, recounting his crimes, threatening more murders, and making bay area residents very edgy. >> in the '70s, there was a certain kind of killer who had the skill to get away with murder, long enough to assemble a body count where they would be classified as serial killer. >> in los angeles, a killer, the police are calling the hillside strange lette strangler, have killed ten young women and left their bodies along the highway. the police found another, number 11, they think. >> two young paper boys discovered the latest victim,