Tansy Bestigui claimed to have witnessed Lula being pushed down the stairs

Tansy Bestigui’s claim that she witnessed Lula Landry being thrown from a balcony becomes a contested piece of evidence in the investigation: the police establish that her account of hearing an argument is incompatible with the soundproofed flats, yet Cormoran Strike later concludes that she may genuinely believe she heard the argument. The distinction between what Tansy reports, what can be verified, and what she may believe leaves her testimony both compromised and potentially significant.

The First Account and Its Challenge

When Detective Eric Wardle recounts the police response to Strike, he says he and Carver reached the scene around twenty to twenty-five minutes after Lula’s death. Tansy was still visibly distressed and telling people that there was a murderer in the building. Her initial account placed her awake around two in the morning, going to the bathroom, hearing shouting from two flats above, and seeing Lula’s body fall past the window.

The setting undermined the claim that she had heard the exchange. The Bestiguis’ windows were triple-glazed, designed to keep outside noise from entering; even the police presence and neighbors gathered in the street were not audible inside. Wardle tested the matter by arranging for people in the building and on Lula’s balcony to shout. The people in the first-floor flat could not hear them, despite making an effort. The police therefore concluded that Tansy could not have heard the words she claimed to have heard through a closed window.

Tansy nevertheless supplied dialogue for the supposed confrontation. In the version Wardle reports, Lula said something like “You’re too late,” and a man called her a liar. Wardle attributes her supposed hearing to cocaine use, but that is his explanation, not an independently established account of what she experienced. The mismatch between the acoustics and her certainty is central to why the police rejected her testimony.

Publicity and the Changing Story

While the police were testing her claim, Tansy was telling people that she was the sole witness to Lula’s murder. Neighbors had heard her shouting about an intruder, and the press gathered outside. Newspapers had already publicly treated Evan Duffield as responsible before the police returned to question her. The attention gave Tansy’s claim a public life of its own, separate from what investigators could substantiate.

Confronted with the sound test, Tansy changed her explanation: she said she had opened the windows for fresh air. Wardle points out that it was snowing and below freezing. Her late addition did not resolve the investigators’ doubts; instead, it made the account look like an adjustment made after its original version had been disproved.

Later, during a meeting attended by Strike and John Bristow, Tansy gives another version of the circumstances. She says she had gone to the bathroom for a drink of water, rather than to urinate, and was crossing the sitting room toward the bedroom when she heard shouting. She now attributes to Lula the words “It’s too late, I’ve already done it,” followed by a man calling her a “lying fucking bitch.” Tansy then says that he threw Lula over and that she saw her fall. Her small, abrupt hand movement imitates Lula’s flailing, but the changed setting and dialogue further distinguish this account from the one she first gave police.

Strike’s Assessment

When Strike tells Tansy that the police disregarded her evidence because they did not think she could have heard the exchange, she snaps that they were wrong and insists that she did hear it. Her confidence does not settle the question: it sits alongside the demonstrable problem of the closed window and the successive revisions to her story.

After the meeting, Strike reflects on Tansy’s expression, tone, and manner. He is experienced at recognizing liars and believes that she is lying about important parts of her account. Nonetheless, he is surprised to find himself convinced that she genuinely believes she overheard an argument before Lula fell. The argument is the part that seems authentic to him; he sees its apparent sincerity as surrounded by details that are readily disproved.

Strike’s conclusion is deliberately narrower than accepting Tansy as a reliable witness. He does not establish that she accurately heard the exchange, or that she saw the fall as she claims. Instead, he distinguishes a possible sincere belief from the false or changing circumstances used to support it. Her testimony remains suspect, but her insistence that an argument took place prompts Strike to ask why she would preserve that central claim while surrounding it with falsehoods.

Significance to the Investigation

Tansy’s account demonstrates how a witness can be simultaneously unreliable and consequential. The police have a concrete reason to reject her reported words: the soundproofing and the test at the flats contradict her claim that she heard them through a closed window. The press, meanwhile, amplifies the story before investigators have accepted it, while Tansy’s changing explanation complicates any attempt to separate observation from invention.

For Strike, the unresolved tension is not proof that Tansy’s version is true. It is a lead about the structure of her account: if the claim of an argument is what she genuinely believes, the surrounding fabrications may indicate that she regards some part of the truth as dangerous. Her testimony therefore shifts from an apparently straightforward eyewitness claim to a problem of credibility, belief, and concealment—one that Strike keeps open rather than treating as either fully true or wholly imagined.