Investigators in the Leonard Lake murder case in San Andreas said that excavation of a new site revealed a survivalist's cache that includes automatic weapons and more evidence that a San Francisco used car salesman fell victim to the suspected mass killer. State Department of Justice spokeswoman Kati Corsaut said detectives searching property in a remote area of Calaveras County about three miles from the mountain hideaway once occupied by Lake found a driver's license and other identification belonging to 39-year-old Paul Cosner among the contents of four plastic containers. Lake has been linked to the disappearance of 22 people. He died in police custody after swallowing poison. Corsaut said the cache at the new site included an automatic AR-15 rifle, a .22-caliber semiautomatic pistol and silencer, ammunition for various weapons, camouflage clothes, military-type food rations, a multipurpose knife, medical supplies and candles.