William Erwin Walker, also known as Erwin M. Walker and Machine Gun Walker (born Erwin Mathias Walker; October 6, 1917− October 7, 2008), was an American police employee and United States Army World War II veteran, known for having committed several thefts, burglaries, and shootouts with police in Los Angeles County, California, in 1945 and 1946, one of which resulted in a fatality. The film He Walked by Night (1948) was loosely based on Walker's 1946 crime spree.
Ramón Bojórquez Salcido (born March 6, 1961) is a Mexican convicted spree killer who is currently on death row in California's San Quentin State Prison. He was convicted for the 1989 murders of six female family members and one male supervisor at his workplace. His victims included his wife and two of his daughters, four-year-old Sofía and 22-month-old Teresa. A third daughter, three-year-old Carmina, was left lying in a field beside the bodies of her sisters for thirty-six hours after being slashed across the throat by her father but was eventually rescued.Salcido's victims were killed in the cities of Sonoma and Cotati, California. Maria, Marion, and Ruth Richards were killed at a house at Lakewood Drive in Cotati, and Salcido's relatives and Toovey were killed in Sonoma.
David Joseph Carpenter (born May 6, 1930), also known as The Trailside Killer, is an American serial killer and serial rapist known for stalking and murdering a variety of individuals on hiking trails in state parks near San Francisco, California. He attacked at least ten individuals and was convicted in seven murders and was confirmed to be the killer in an eighth murder; Carpenter is also suspected in two additional killings. Two victims, Steven Haertle and Lois Rinna, mother of television personality Lisa Rinna, survived. Carpenter used a .38 caliber handgun in all but one of the killings. A .44 caliber handgun was used in the killing of Edda Kane on Mount Tamalpais.