Extinction Chapter 5: The Scent Trail Goes Cold
Spoiler Notice
This summary and analysis contains details from Chapter 5 of Extinction by Douglas Preston. If you have not yet read the chapter, proceed with caution.
Summary
Sheriff Jim Colcord watches CSI leader Romanski pack evidence, including sections of bloodstained turf, into helicopter baskets for transport to Denver. The search for the missing couple has involved over a hundred people but yielded nothing. Colcord reflects on the bizarre nature of the case: two bodies vanished, no clear motive, and at least four killers.
Dog handler Sam Acosta arrives with two redbone bloodhounds. Acosta uses socks from the victims as scent articles. He, Colcord, and FBI Agent Frankie Cash set out to follow the trail. The dogs immediately pick up the scent from the tent site and move downhill toward a pond. The trail leads across rocky terrain and onto a broad, hard-packed path that Colcord identifies as a woolly mammoth trail. Along the way, the dogs pause at a large pile of mammoth dung—a common sight in the area.
Reaching a ridge, the group spots a herd of mammoths across a lake, including a calf Cash nicknames “Ping.” The dogs freeze momentarily but resume tracking. However, in a heavily dung-covered hollow—a mammoth “stomping ground”—the dogs begin circling and lose the scent. Colcord realizes the killers deliberately led the trackers into the dung field to confuse the bloodhounds. The chapter ends with the search stalled, leaving the fate of the missing couple uncertain.
Key Events
- CSI finishes collecting evidence and prepares for helicopter transport.
- Dog handler Sam Acosta arrives with two bloodhounds; scent articles are obtained.
- Acosta, Colcord, and Cash begin tracking from the tent site.
- The dogs follow the scent along a mammoth trail, passing dung piles.
- The tracking party sees a herd of mammoths, including a calf.
- The dogs lose the scent in a heavily dung-laden area.
- Colcord concludes the killers used the dung to foil the bloodhounds.
Character Development
- Sheriff Jim Colcord: Observes the CSI team critically and appreciates their thoroughness. He is relieved that the wealthy resort owner Maximilian is occupied elsewhere. Colcord shows a native Coloradan’s skepticism of Easterners (Cash) but also respects her competence after their exchange about firearms. His suspicion that the dung field was a deliberate obstacle reveals his growing insight into the killers’ methods.
- Agent Frankie Cash: Her banter with Romanski shows a sharp, ornery personality. She takes charge in deciding who will accompany Acosta. Her knowledge of firearms (Baby Glock) and willingness to engage in small talk with Colcord soften their initial tension. She is observant and quick to nickname the baby mammoth “Ping.”
- Sam Acosta: Professional and focused, Acosta avoids handshakes to prevent scent contamination. He commands his dogs with soft commands and explains their behavior. He is aware of time pressure.
- Romanski: Efficient CSI team leader who good-naturedly claps back at Cash’s teasing about chiropractors.
Themes, Symbols, or Motifs
- The Unreliability of Scent: The chapter foregrounds the sense of smell (scent articles, bloodhounds, dung) and shows how even the best trackers can be thwarted. The killers’ use of a mammoth dung field to mask their trail symbolizes the chaotic, primal nature of the crime scene.
- Human vs. Prehistoric: The setting juxtaposes modern forensic methods (Ziploc bags, helicopters, CSI) with the ancient, almost Jurassic landscape of mammoths and their waste. The mammoths are both a tourist attraction and an obstacle to justice.
- Suspicion of Outsiders: Colcord’s internal monologue reveals a native Coloradan’s distrust of East Coast transplants, a thread that runs through the chapter and adds texture to his interactions with Cash.
Why This Chapter Matters
Chapter 5 marks a turning point in the investigation: the search transitions from an exhaustive ground search to a focused tracking operation, only to hit a dead end. The failure of the bloodhounds deepens the mystery and raises the stakes. The chapter also introduces the mammoth herd as an active element in the setting—more than scenery, they become part of the killers’ strategy. The relationship between Colcord and Cash evolves from wary suspicion to grudging cooperation, setting up their working dynamic for the rest of the novel.
Study Questions and Answers
1. Why does Colcord believe the killers led the dogs into the mammoth dung field?
Colcord reasons that a heavily dung-laden area is a perfect place to confuse and shake tracking bloodhounds. The overwhelming scent of mammoth dung masks the human scent, causing the dogs to circle and lose the trail. He infers that the killers deliberately chose that route to escape detection.
2. How does the exchange about firearms reveal character dynamics between Colcord and Cash?
When Cash quietly asks what firearm Colcord carries, he is pleased by the question. He answers “Beretta 92,” and she reveals she carries a “Baby Glock 9 millimeter.” Colcord internally wonders if anyone from back East can shoot well, but the exchange shows a mutual professional respect. It also hints that both expect the search might end in a shoot-out.
3. What role does the Erebus Resort play in this chapter beyond setting?
The Erebus Resort is the reason the mammoths exist in the Colorado wilderness. Their presence transforms the landscape into a tourist attraction, but it also creates practical complications for law enforcement. The mammoth trails, dung, and wallows become part of the killers’ escape route. The resort’s helicopters and owner Maximilian are mentioned but remain in the background, suggesting powerful interests that may later influence the case.