<P> Within an hour of the Rosemead home invasion Ramirez pulled 30 - year - old Tsai - Lian "Veronica" Yu out of her car in Monterey Park, shot her twice with a . 22 caliber handgun, and fled . She was pronounced dead upon arrival at the hospital . The two murders (and third attempt) in a single day attracted extensive coverage from news media, who dubbed the curly - haired attacker with bulging eyes and wide - spaced, rotting teeth "The Walk - in Killer" and "The Valley Intruder". </P> <P> On March 27, 1985, Ramirez entered a home that he had burglarized a year earlier in Whittier at approximately 2 a.m. and killed the sleeping Vincent Zazzara, age 64, with a gunshot to his head from a . 22 caliber handgun . Zazzara's wife Maxine, age 44, was awakened by her husband's murder, and Ramirez beat her and bound her hands while demanding to know where her valuables were . While he ransacked the room, Maxine escaped her bonds and retrieved a shotgun from under the bed, which was not loaded . An infuriated Ramirez shot her three times with the . 22, then fetched a large carving knife from the kitchen . Her body was mutilated with multiple stab wounds, and her eyes were gouged out and placed in a jewelry box, which Ramirez left with . The autopsy determined that the mutilations were post-mortem . Ramirez left footprints from a pair of Avia sneakers in the flower beds, which the police photographed and cast . This was virtually the only evidence that the police had at the time . Bullets found at the scene were matched to those found at previous attacks, and the police realized a serial killer was at large . Vincent and Maxine's bodies were discovered by their son, Peter . </P> <P> On May 14, 1985, Ramirez returned to Monterey Park and entered the home of Bill Doi, 66, and his disabled wife Lillian, 56 . Surprising Doi in his bedroom, Ramirez shot him in the face with a . 22 semi-automatic pistol as Doi went for his own handgun . After beating the mortally wounded man into unconsciousness, Ramirez entered Lillian's bedroom, bound her with thumbcuffs, then raped her after he had ransacked the home for valuables . Bill Doi died of his injuries while in the hospital . </P> <P> On the night of May 29, 1985, Ramirez drove a stolen Mercedes - Benz to Monrovia and stopped at the house of Mabel "Ma" Bell, 83, and her sister Florence "Nettie" Lang, 81 . Finding a hammer in the kitchen, he bludgeoned and bound the invalid Lang in her bedroom, then bound and bludgeoned Bell before using an electrical cord to shock the woman . After raping Lang, he used Mabel Bell's lipstick to draw a pentagram on her thigh, as well as on the walls of both bedrooms . Discovered two days later, both women were found alive but comatose; Bell later died of her injuries . </P>

Who was the killer on the night of