The film leaves Billie Booth's death under suspicion. The later novel provides an answer that should not be confused with what the 2019 edit shows.
The answer depends on the version
In Once Upon a Time in Hollywood, we do not see Cliff Booth kill his wife. The suspicion appears in conversations and in a brief flashback that cuts away before the outcome. The novel written by Tarantino and published in 2021 does confirm that Cliff killed her. That difference makes it possible to answer precisely: the film keeps the ambiguity; the book expands the episode and establishes his responsibility.
Billie Booth is played by Rebecca Gayheart. She is not Rumer Willis, who appears in the film as Joanna Pettet. The identification matters because the wife has a very brief presence and it is easy to mistakenly associate her face with another cast name. The character serves a specific function in Cliff's story, but she does not have her own arc comparable to that of the main characters.
Information from the book can enrich a later reading, although it does not materially change the images released in 2019. A viewer who has only seen the film gets less information than a reader of the novel. Treating the two experiences as identical erases an essential narrative choice: Tarantino chose to show the threshold of an action on screen and leave out what would resolve the doubt.
The Once Upon a Time in Hollywood novel expands many aspects of the characters' world. In this case, the expansion directly affects the moral judgment of Cliff. There is no need to reproduce every detail of the literary passage to recognize its consequence: cinematic uncertainty becomes a narrated fact there. It is worth preserving that distinction when discussing whether the film reveals, suggests, or confirms a murder.
The weapon, the sway, and the cut
The scene places the couple on a boat. Billie speaks with hostility and Cliff remains seated with a spearfishing gun. The direction of the object and the movement of the boat create an immediate expectation. The viewer understands that a death may occur, but the edit interrupts the moment before the decisive act and its consequences are shown.
The lack of resolution does not mean the absence of clues. The composition brings domestic conflict together with an instrument capable of causing harm. Nor does it amount to complete proof of intent. That is precisely why the scene is so uncomfortable: it offers enough material to raise suspicion while withholding the information that would let the episode be closed as an accident or a deliberate attack.
The insertion belongs to the play of memories and flashbacks that characterizes Tarantino's nonlinear narrative. It is not presented as a police file or as a full judicial reconstruction. It is a selected fragment within another situation. Its brevity forces us to relate it to what other characters say and to the reputation that follows Cliff in his work.
The tone adds another difficulty. The dryness of the performance and the speed of the cut can produce a comic reaction, but the content remains a possible death within a couple. Laughter does not prove innocence or turn Billie into someone who deserves violence. The contrast between form and gravity forces us to observe how the film manages sympathy toward a protagonist who is already appealing.
A reputation that affects his present
The episode does not exist only to fuel a theory among viewers. Within the story, the suspicion hurts Cliff's job prospects. Some people do not want him around, and Rick has to defend him in an effort to get him work. The uncertainty therefore has practical consequences even without a shown conviction: coworkers decide whom they want to share a set with.
Rick trusts his friend and tends to dismiss the accusation as a rumor. That stance defines Rick; it is not an omniscient voice certifying what happened. Likewise, the rejection from other characters shows a belief without replacing the missing scene on its own. The film sets out opposing opinions so the viewer can sense the distance between personal loyalty, reputation, and knowledge.
The ambiguity complicates the portrait of Cliff Booth because it exists alongside his patience, his ability to care for Brandy, and his support for the actor. The character does not become transparent simply by doing likable things. The question about Billie prevents his charisma from becoming a moral guarantee, especially when he later proves again that he can carry out violence very effectively.
The most rigorous reading keeps the two answers separate. The film leaves a suspicion deliberately unresolved and invites us to consider how it shapes our relationship with Cliff. The novel confirms the fact and shifts the discussion toward the contradictions of a character responsible for that death. Knowing more does not require us to forget how the mystery was built: it lets us appreciate that each version asks the audience for a different kind of judgment. The literary answer resolves the event, but it leaves intact the difficulty of assessing the character as a whole.
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