The Zodiac name was used by the killer himself in taunting letters he sent to reporters, using a cross inside a circle as his signature - the same logo he scrawled on one victim's car.
What appeared to be a grave site was discovered near the Clair Tappaan Lodge in NordenCalifornia, on Sierra Club property, but an excavation yielded only a pair of sunglasses. Ina picture surfaced of known Zodiac victim Darlene Ferrin and a man who closely resembles the composite sketch, formed based on eyewitnesses' descriptions, of the Zodiac Killer.
For about 90 minutes he drove back and forth around the backroads near Tracy. While the couple sat in Ferrin's car, a second car drove into the lot and parked alongside them but almost immediately drove away. Allen reportedly took responsibility for the murder of Paul Stine, a taxi driver who was shot in the head by his passenger.
And then it became permanent, and it became a cloud, a shadow that followed him for the rest of his life.
The Chronicle turned over all the material to the Vallejo Police Department for further analysis. Ina nemesis of Allen's named Ralph Spinelli told police that Allen admitted to being the Zodiac and that he would prove it by going to San Francisco and "killing a cabbie.