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Rick Marshall was another suspect further developed by former San Francisco Chronicle cartoonist Robert Graysmith.
Marshall lived in a basement on Scott Street in San Francisco in 1969, not very far away from the Paul Stine murder location. Marshall worked at San Francisco's KTIM radio station in the early 1970s, and as a projectionist at the Avenue Theater.
According to Zodiackiller.com, Marshall was working for Tektronix and repairing organs in San Francisco's Castro District as of 1989.