Chapter Twenty‑One: Willow’s Challenge to Perez’s Theory

⚠️ 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

Willow sits on the harbour wall at Pierowall while Perez explains his conversation with Paul Rutherford. She listens but cannot share his enthusiasm. She suspects her dislike of the professor may be creating unconscious bias, so she strives to remain objective. Willow and her colleague Phil have just finished speaking with Rosalie Greeman. When Perez calls, Willow tells Phil to go inside and stays outside, watching a creel boat approach the jetty. She rejects Perez’s theory because Johnson and his wife were at Evelyn and Tom Angel’s house on the evening of Archie’s disappearance, giving Johnson an alibi. James Grieve had said the killer would have been bloodstained, and the Angels would have noticed. Willow acknowledges the motive Perez has found is credible but cannot see how Johnson could have committed the murders. Perez persists, arguing that the timeline might be flexible: Archie could have met George first, then confronted Johnson later, and Grieve could not pinpoint the time of death. He has arranged to speak with Vaila to see if Archie mentioned Johnson. Willow agrees to re‑interview Evelyn and Tom Angel to check if the Johnsons’ arrival time was remembered correctly.

Key Events

Willow receives Perez’s account of his talk with Paul Rutherford but remains unimpressed.
She reflects on her own potential bias against the professor and resolves to stay open‑minded.
Willow points out the alibi: Johnson and his wife were at the Angels’ home from about six until the call from Vaila about Archie’s disappearance.
James Grieve’s observation about bloodstains on the killer further undermines the theory, according to Willow.
Perez suggests that Archie might have met with George to learn more about the professor’s scam before confronting Johnson later in the evening.
Perez notes that Grieve could not give a precise time of death, so Archie might not have been dead when Vaila first thought he was missing.
Willow agrees to interview Evelyn and Tom Angel again to verify the Johnsons’ arrival time.
Perez has already set up a meeting with Vaila to ask whether Archie had mentioned Johnson.

Character Development

Willow shows her professionalism by consciously trying to counteract her dislike of Paul Rutherford so it does not prejudice her assessment of Perez’s theory. She is portrayed as methodical and sceptical, unwilling to accept a suspect without solid opportunity. Her decision to re‑examine the Angels’ account demonstrates her commitment to evidence.

Perez appears unusually driven. Willow notes that he is usually considered and cautious, but here his ideas tumble out quickly. His personal closeness to Archie makes this case personal, and he is “dangerously committed” to his hypothesis, risking twisting facts to fit it. This marks a shift from his typically balanced demeanour.

Paul Rutherford is not directly present but is the subject of Perez’s theory. Willow’s antipathy toward him is acknowledged, hinting at a possible future tension between her judgment and Perez’s.

Themes, Symbols, or Motifs

Bias and objectivity dominate the chapter. Willow actively monitors her own unconscious bias against the professor, illustrating the difficulty of remaining impartial when a victim was a friend of the investigator. Perez’s emotional involvement stands in contrast to Willow’s cooler analysis.

Alibi and opportunity are tested. The chapter drills into the reliability of witness accounts (the Angels’ timeline) and the ambiguity of time of death. This motif of fragile evidence recurs throughout the novel.

The harbour and the creel boat provide a calm, reflective setting while Willow wrestles with the case. The stillness and the cries of gulls contrast with the urgency of the argument, symbolising the tension between emotional conviction and hard facts.

Why This Chapter Matters

This chapter is a turning point in the investigation. Perez proposes a credible motive for Paul Rutherford, but Willow’s resistance forces both of them to scrutinise the facts more closely. The decision to re‑interview the Angels and to speak with Vaila shows that the case is far from closed. The clash between Perez’s personal investment and Willow’s professional caution deepens the character dynamics and raises the stakes. It also reminds the reader that a good theory must be backed by opportunity, not just motive.

Study Questions and Answers

Why does Willow reject Perez’s theory about Johnson being the killer?
Willow argues that Johnson had an alibi: he and his wife were at Evelyn and Tom Angel’s house from about six until the call about Archie’s disappearance. James Grieve had also stated that the killer would have been bloodstained, and the Angels would have noticed any such evidence.
How does Perez try to counter Willow’s objection regarding opportunity?
Perez suggests that Archie might not have been dead when Vaila first thought him missing. Archie could have met George to discuss the professor’s scam and then summoned Johnson to the excavation site later. Grieve could not pinpoint the time of death, so the timeline remains flexible.
What does Willow’s approach to her own bias reveal about her character?
Willow consciously checks her dislike of Paul Rutherford to avoid unconscious bias. This shows her commitment to fairness and methodical policing, even when personal feelings might tempt her to accept an easy suspect.