Chapter 90 Summary, Analysis, and Key Takeaways
⚠️ Spoiler Warning: This guide contains detailed spoilers for the entire novel. Proceed only if you've finished reading or are comfortable knowing the plot.
Summary
Chris is alone in his flat, celebrating the resolution of the Jack Mason case in his own understated way: blueberry kombucha, celery sticks, and organic hummus, with darts on the television. His mind drifts to the irony of modern murder. In the pre-DNA era, a killer could wash off blood and walk away; now, a close-range shooting leaves traces of the victim’s DNA on the shooter’s hands and clothes, and those traces transfer to anything they touch. He almost feels sorry for homicidal maniacs.
The chapter circles back to the Kent Police Awards ceremony, where Patrice had playfully asked Chris who he might arrest next to earn another commendation—another night of black tie, free prosecco, and a shiny badge in a velvet pouch. Chris has just received a message confirming he will indeed be invited back next year, and he knows the credit belongs to Patrice.
The breakthrough began with a nagging detail: the gun Jack Mason used to shoot himself was absurdly small. For a man with access to a wide arsenal, why choose a weapon small enough to slip into a pocket? The answer, Chris realizes, is that the gun had been slipped into someone’s pocket. Andrew Everton, while working at the archaeological dig in Heather Garbutt’s garden, had stolen the smallest gun he could find—small enough to hide from the police officers swarming the site. He couldn’t have concealed an AK-47, even though two had been uncovered.
Chris requested additional tests on the gun. The results confirmed that it had been buried alongside four other weapons, matching the fibers from the cloth they were wrapped in and the acids from the soil, as well as the ammunition. So Everton had seen the gun, stolen it, and used Jack Mason’s own weapon to kill him.
But the evidence was not perfect. No one had witnessed Everton pocketing the gun. Any of the dig workers could have taken it, or Jack Mason himself might have dug it up weeks earlier, planning his suicide. A competent defense lawyer could easily cast doubt on the gun’s provenance, and Everton would certainly hire one. Chris was convinced of Everton’s guilt, but he needed proof that placed Everton directly at the scene of the murder, at the moment it happened—some DNA.
Chris and Donna discussed the problem at length. They were determined not to let Everton wriggle out of a murder charge on a technicality. The question was where to find such evidence. It was Patrice who ultimately suggested the exact location. Chris was dubious, thinking it would be too ironic, but after a few prompts he contacted the forensics lab. Today the results came back, and she was right. He has just texted her at a Parents’ Evening to share the news.
Everton would have cleaned himself thoroughly, washing away the blood and gore and the DNA it contained. But he had been sloppy—or, as Chris now suspects, cocky. Perhaps he hadn’t destroyed his clothes until the day after the murder, the day he sat laughing and smiling next to Chris and Patrice at the awards ceremony. Perhaps he recontaminated himself while disposing of them. Whatever the reason, it will be very hard for Andrew Everton to explain where traces of Jack Mason’s DNA have just been found: on the shiny badge and velvet pouch that Everton had handed to Chris at the Kent Police Awards. Chris pops another celery stick into his mouth, satisfied.
Key Events
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Chris celebrates the case’s resolution with kombucha and celery, reflecting on the challenges DNA evidence poses for murderers.
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He recalls Patrice’s question at the Kent Police Awards about future commendations and receives confirmation he’ll be invited back.
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Chris realizes the small gun was small because it had been slipped into someone’s pocket—Andrew Everton’s.
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Tests prove the gun was buried with four others, matching fibers and soil acids, linking it to the dig.
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Chris and Donna discuss the need for direct evidence to avoid a technicality.
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Patrice suggests where DNA might be found; Chris contacts the forensics lab.
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Results confirm traces of Jack Mason’s DNA on the badge and velvet pouch Everton handed to Chris at the awards.
Character Development
Chris demonstrates his methodical, intuitive detective work. The chapter shows him piecing together a seemingly trivial detail—the gun’s size—into a full theory of the crime. His willingness to follow Patrice’s suggestion, despite his initial skepticism, highlights his openness to collaborative deduction. His quiet celebration, with kombucha and celery rather than alcohol, underscores his personal growth and sobriety.
Patrice emerges as a sharp observer. Her question at the awards ceremony about future commendations plants the seed for the DNA discovery, and her specific suggestion about where to look proves crucial. She is not just a supportive partner but an active contributor to solving the case.
Andrew Everton is characterized indirectly through Chris’s reflections. His cockiness—failing to destroy his clothes until the day after the murder, then sitting cheerfully beside the police—reveals an overconfidence that ultimately leads to his undoing.
Themes, Symbols, or Motifs
DNA as an inescapable witness: The chapter emphasizes how modern forensic science makes murder far more difficult to conceal. DNA transfers from victim to killer and then to objects, creating a silent trail that can be traced years later.
Irony: The discovery of Jack Mason’s DNA on the award badge and pouch is deeply ironic. Everton, seeking to celebrate his own cleverness at a police ceremony, unknowingly carries the evidence of his crime. Chris notes the irony himself, and it underscores the theme of poetic justice.
Overconfidence: Everton’s belief that he has cleaned up after himself is his fatal flaw. The chapter suggests that arrogance, not carelessness, led him to recontaminate himself while disposing of evidence.
Collaborative deduction: Chris’s success depends on input from Donna and, crucially, Patrice. The chapter reinforces the idea that solving complex cases requires multiple perspectives.
Why This Chapter Matters
This chapter delivers the final piece of evidence that clinches Andrew Everton’s guilt. It resolves the central mystery of who killed Jack Mason and how, transforming a circumstantial case into one with direct DNA proof. The revelation that the DNA was found on the award badge and pouch ties the case back to the Kent Police Awards, creating a satisfying narrative loop. It also sets up the inevitable confrontation with Everton, as Chris now has the evidence to arrest him. The chapter highlights the importance of patience, collaboration, and attention to small details—hallmarks of the Thursday Murder Club’s approach.
Study Questions and Answers
1. Why was the small size of the gun the key clue for Chris?
Chris realized that the gun was small enough to be slipped into someone’s pocket. Since Jack Mason had access to many larger guns, the only logical explanation was that the weapon had been stolen and hidden by someone—Andrew Everton—who needed to conceal it while walking past police officers at the dig.
2. What made the initial evidence against Everton insufficient for a conviction?
No one saw Everton take the gun from the dig. The tests proved the gun had been buried with four others, but any person at the dig could have stolen it, or Jack Mason himself might have dug it up earlier. A defense lawyer could easily cast doubt on the gun’s provenance, so Chris needed direct evidence placing Everton at the murder scene.
3. How did Patrice contribute to solving the case?
Patrice suggested the specific location where Jack Mason’s DNA might be found—on the badge and velvet pouch that Everton had handed to Chris at the awards ceremony. Her insight led Chris to request forensic tests, which confirmed the DNA and provided the direct evidence needed to charge Everton.
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