Shortly after this film released, a young woman named Elizabeth Short was murdered in Los Angeles. The local newspapers dubbed the case the "Black Dahlia" as a morbid twist on this film's title. Unlike the movie, the Short murder case is still unsolved.
When Alan Ladd was called up for military service, production on the movie (then still in the screenplay stage) had to be rapidly stepped up. According to a near-legendary story, screenwriter Raymond Chandler offered to finish the screenplay by working drunk: in exchange for sacrificing his health to produce the requisite pages on time, Chandler was permitted to work at home (a privilege rarely granted to screenwriters) and was provided two chauffeured cars, one to convey the completed pages to the studio and the other for his wife. Chandler turned the script in on time. Many now believe the "drunkenness" was simply a ruse by Chandler to wrangle extraordinary privileges from the desperate studio.
In Raymond Chandler's original script, the murder was committed by the shell-shocked Buzz. The War Office forced Chandler to rewrite the script, as it was not deemed acceptable to portray an American serviceman as a murderer.
Raymond Chandler, who wrote the screenplay, claimed that producer John Houseman was in "the doghouse" and director George Marshall "was a stale old hack who had been directing for thirty years without once having achieved any real distinction", so Chandler went on to the Paramount set to direct some of the scenes himself.
Elizabeth Short got the nickname “The Black Dahlia” from a bartender at a Long Beach bar she frequented. The Blue Dahlia (1946) was playing at a theatre down the street, and the bartender got the name wrong. Elizabeth picked up on that and kept the nickname, adding a flower to her hair to complete the transformation. She was murdered the next year (1947).
One of over 700 Paramount Productions, filmed between 1929 and 1949, which were sold to MCA/Universal in 1958 for television distribution, and have been owned and controlled by Universal ever since.
Many of the cars in the film have a "B" sticker on the windshields. This is a reflection of the wartime rationing of gasoline. Gas was rationed primarily to save rubber, because Japan had occupied Indochina, Malaysia, and Indonesia. (There was a shortage of gas on the East Coast until a pipeline from Texas was constructed to replace the transport of crude oil by sea.) The B sticker was the second lowest category, entitling the holder to only 8 gallons of gas a week.
Some sources erroneously include Harold J. Stone in an undetermined, uncredited minor role; Stone does not appear in this film in any capacity. At the time it was filmed (in Hollywood), he was in New York City appearing on the stage in a prominent role in "A Bell for Adano" (1944-1945).