Richard Marshall interview below.
Although no hard facts tie Rick Marshall to any of the crimes, there is again food for thought with various coincidences.
Rick Marshall was born in Texas (1928 - 2008), which makes him the correct age range as testified to by surviving eyewitnesses of between 35-45 years, during the confirmed four attacks and five zodiac murders.
He lived in the key areas during the majority of the attacks, residing in Riverside, nearby the murder scene of Cheri Jo Bates in 1966 and in a basement residence in Scott Street,San Francisco, just a few miles from Washington and Cherry Street where taxi driver Paul Stine was killed with a single shot to the head.
The killer requisitioned the cab at the corner of Mason and Geary Street, also in close proximity to the Scott Street residence. See distance on Google maps.
Rick Marshall lived in San Francisco for 20 years, between 1969 and 1989.
Rick Marshall worked for KTIM, a Bay Area radio station and ran the Avenue Movie Theatre, including projectionist work, which specialized in silent movies, and one of his favorite films was the 'Red Phantom'. Running the theater was not easy, engaging the use of volunteer juvenile offenders to assist in its daily running. The theater funded the running of old movies on Tuesday and Wednesday, by showing more contemporary productions for the rest of the week. The Avenue Theater was built in 1927 and situated at 2650 San Bruno Avenue, San Francisco, approximately 4.5 miles from the Mason and Geary Street intersection in the Theater District, where Paul Stine fatefully picked up the Zodiac Killer on October 11th 1969. See on Google Maps.
View movie poster handwritten by Rick Marshall for two upcoming Charlie Chaplin shows at the Avenue Theatre, Caught in a Cabaret (1914) and The Property Man (1914).
He was also allegedly in possession of a Royal Typewriter, which is another link to Zodiac case in respect to the typed 'Confession Letter', sent to the Riverside Police and Riverside Enterprise on November 29th 1966, graphically describing the repeated stabbing and murder of Cheri Jo Bates on October 30th 1966 outside the Riverside City College Library.
The Exorcist Letter , widely believed to be the final letter of the Zodiac sent on January 29th 1974, after a three year drought of correspondence by the killer, included strange symbols said to marry up closely with ones used on KTIM call letters.
Robert Graysmith, who spent ten years researching for his book Zodiac, has ultimately confirmed he visited the home of a man who knew Rick Marshall, ending up in the homeowners basement, where he described hearing footsteps in the above room which unsettled him, as the owner had reassured him they were alone. This man was Bob Vaughn, a professional organist, who played in silent movie theaters, including the Port Theater, in which Rick Marshall worked in 1974, as well as the Roxie Theater in San Francisco and was depicted in the 2007 David Fincher Zodiac film, to be the person responsible for the handwriting on the movie theater posters. However, he would have been too old to be the Zodiac Killer based on eyewitness testimony and was never regarded as a suspect by law enforcement.
Speculation circulated in certain quarters that Rick Marshall may have had an accomplice in the Zodiac crimes, which included Richard Gaikowski because of his love of classic films also, and his running of the Roxie Theatre in the Bay area.
See also the Rick Marshall extracts from the film Zodiac here.
Rick Marshall was investigated by the Napa County Police Department, but nothing tangible emerged and Marshall was in later years cleared from ongoing investigations, shortly before his death in 2008.