Debrief / case study
First Approach to Implementing Search Theory in Mexico: Lessons Learned, Future Perspectives, and Public Policy Implications
Examines a three-week mountain search involving more than 2,500 participants, dogs, drones and aircraft. Search-theory calculations and mapped effort were used to examine coverage and support the eventual transition from search activity to police investigation.
By Kris Manning 2 min read
- Search planning
- Probability & search theory
- Search management
- Training & competence
Authors: Rafael López-Martínez and colleagues
Published: 1 May 2026
Original: Article PDF
Evidence: Emerging — peer-reviewed single-case analysis.
Summary: Examines a three-week mountain search involving more than 2,500 participants, dogs, drones and aircraft. Search-theory calculations and mapped effort were used to examine coverage and support the eventual transition from search activity to police investigation. The analysis exposed repeated searching of some routes alongside weak recording of where resources had actually searched.
Operational significance: Its strongest lesson is not the calculated POD; it is that resource numbers do not establish search quality. Without reliable tracks, task records and debrief information, Search Management cannot confidently determine:
What was actually covered.
Which tactics were used.
Whether repeated coverage was justified.
Which areas remain meaningfully unsearched.
Whether suspension reasoning rests on defensible evidence.
This is directly relevant to distinguishing “resources deployed” from “search effort assured.”
Transferability: Transferable with adaptation, particularly to search-area debrief, progress monitoring, operational assurance and suspension decisions.
Limitations: Only one-third of teams recorded routes; aerial, dog and drone tracks were excluded. Sweep width was assumed to be five metres, partly because of the subject’s clothing, rather than established through testing. The missing person was not found, so the model could not be validated against subject location. It is a single case in a very different command and volunteer environment. The calculated coverage should therefore not be treated as ground truth.
Training sections: Search Operations and progress monitoring; search-area debrief and assurance; reassessment; decision logging; suspension and conclusion; organisational learning.
Training decision — Reinforce: Supports the manual’s Ops-first debrief and Planner assurance model. A task should not be treated as complete merely because a team was deployed or returned.