Other mistake: Although the Lieutenant is actually sent to the police station in precinct 9, division 13, the sign over the door states it to be division 14.
Other mistake: The chronology of dates on the teletype printer at the end of the film are not in the correct order. We see "March 13, 1975" followed by "January 3, 1975", which is then followed by two August 1974 dates.
Other mistake: In the beginning of the movie, the radio announcer says it is 74 degrees with a high of 89 degrees expected. The guy directing the oil truck breath is visible and is wearing a winter coat, not very likely at that temperature. People walking the streets are too heavily dressed also.
Other mistake: In one scene, the mayor of San Francisco and his aide go to a Giants baseball game at Candlestick Park. When the mayor and the aide are seated while having a conversation, a young man sitting a row or two behind the mayor leans slightly forward, looks directly into the camera, and starts smiling and waving.
Other mistake: Gregory Peck and David Warner are attacked in the cemetery by four large vicious dogs, who attack their throats, arms and legs, but once they escape, the only wound seen is the one on Gregory Peck who hurt his arm while climbing over the fence.
Other mistake: Rita is only hit in the thighs with the basketball rafter. That couldn't kill her, and it couldn't make blood come out of her mouth.
Other mistake: When the former pimp brings fresh flowers for Rosa's tomb, the gravestone says she died in 1972, but both the inspector and his colleague said on separate occasions that the murder happened 4 years before - and the movie is set in 1975 and at the exact same day of her death. (00:48:30)
Other mistake: Legendary wrestler Antonino Rocca makes a cameo appearance in the movie. He is, as correctly listed in the closing credits, one of the "Funeral Attendants" together with Michael Weil. However in the opening credits he was specifically billed as the Funeral Director, which is Ronald Willoughby's role as correctly listed in the end credits. (00:00:50 - 01:45:15)