Readiness Brief

Case #: SX-2024-0098
Subject: Marin County Jane Doe — IDENTIFIED 2024-12-04
Prepared for: Othram Inc. · Attn: Dr. Kira Press, Senior Forensic Genealogist
Prepared by: Alejandra Mendoza, Senior Forensic OSINT Analyst, Sequenxa Intelligence Agency
Reviewed by: Jordan Wilson, Director of Investigations, Sequenxa Intelligence Agency
Version: 1 (Released)
Date: May 5, 2026

◇ Section

EXECUTIVE SUMMARY

This case concerned the recovery of a presumed female decedent in Marin County, California on 2011-08-19. Sequenxa received the case on 2024-06-12; identification was confirmed on 2024-12-04 by Othram following preparatory readiness work and parallel public-records research from Sequenxa.

The case is closed. The Handoff Package was delivered to Marin County Sheriff's Office on 2024-12-18 with post-identification investigative context — last-known associates from public records, vehicle history, employment history, and a digital footprint summary up to the disappearance date.

No further action by Sequenxa. Archived for audit reference.

◇ Section

CASE NARRATIVE

Recovery Context

Skeletal remains were recovered on 19 August 2011 in coastal Marin County, California. The case remained unidentified until December 2024.

Forensic Profile

Forensic profile per the original 2011 medical examiner's report: presumed female, age 25–35, mixed European ancestry. Identification confirmed via Othram FGG completed 2024-12-04.

Prior Testing

STR amplification at the time of recovery produced a partial profile insufficient for CODIS upload. Othram's 2024 SNP-driven analysis successfully produced a kinship inference resolving to the confirmed identification.

◇ Section

FORENSIC PROFILE

Presumed sex	Female
Age range	25–35 years at death
Ancestry estimate	European, identified via FGG as belonging to a Northern California / Pacific Northwest cluster
Height range	—
Build	—
Dental	—
Identifying marks	—
Personal effects at recovery	—
Clothing at recovery	—
Estimated PMI	Approximately 5 years at recovery
Estimated death window	—

◇ Section

EVIDENCE SUMMARY

7 graded sources reviewed. Average reliability: B. Average credibility: 2. Distribution by source type:

Source Type	Count	Avg Grade
Official records (NamUs, ME, TBI, etc.)	3	B2
News & archival (newspaper, weather, directories)	1	B2
Internal Sequenxa analysis	3	A1

Full evidence log appended as Appendix A.

◇ Section

CANDIDATE ASSESSMENT

1 candidate hypothesis generated from public-records cross-referencing. 0 have been excluded on forensic grounds.

ID	Assessment	Grade	Status	Notes
CD-00190	STRONG	A1	Confirmed

Detailed candidate profiles, including exclusion reasoning, are appended as Appendix A.2.

◇ Section

FGG ELIGIBILITY DETERMINATION

— eligibility not yet assessed —

◇ Section

FUNDING PATHWAY

Funding is secured via California DOJ Cold Case grant FY2024.

Status	SECURED
Source	California DOJ Cold Case grant FY2024
Estimated cost	—
Notes	—

◇ Section

RECOMMENDED LAB PATHWAY

Othram Inc. (case OTH-2024-1102). Sample workflow complete; identification confirmed.

◇ Section

RISK NOTES & CAVEATS

Brief retained for audit reference. Case is closed; identification confirmed.
Handoff Package was delivered 2024-12-18 (EXP-0070).

◇ Section

RECOMMENDED ACTION

01
No further action. Case closed and archived.

Prepared byA. Mendoza, Senior Forensic OSINT Analyst, Sequenxa________________ Signature

Reviewed byJ. Wilson, Director of Investigations, Sequenxa________________ Signature

Released2024-07-05 10:00Z

DistributionMarin County Sheriff's Office · Othram Inc. · Sealed

◇ Appendix

APPENDIX A — EVIDENCE LOG

EV-00080NamUs recordRetrieved 2024-06-14
A1
NamUs UP Report #UP-150221 — Unidentified Female, Marin County CA
Original NamUs Unidentified Persons record from the 2011 Marin County recovery; baseline forensic profile.
◆ Grade Rationale
Authoritative federal record entered by the agency.
◆ Analyst Summary
Established the baseline forensic profile that ultimately matched candidate CD-00190.
Source: NamUs Unidentified Persons Database, Case #UP-150221, accessed 2024-06-14. · Released 2024-07-01 · J. Wilson
EV-00081News archiveRetrieved 2024-06-14
B2
Marin Independent Journal — "Hiker discovers remains in West Marin" (2011-08-22)
Original local news report on the recovery; details on hiker, location, and initial sheriff response.
◆ Grade Rationale
Established regional paper, named LE source.
◆ Analyst Summary
Confirmed recovery context, supported the working window for date of death.
Source: Marin Independent Journal, "Hiker discovers remains in West Marin," 2011-08-22, p. A2. · Released 2024-07-01 · J. Wilson
EV-00082Lab-providedRetrieved 2024-07-08
A1
Prior STR Test Report — Marin County Sheriff's Office, 2012
Original 2012 STR test report from the agency's contracted lab. Result was a partial profile insufficient for CODIS upload.
◆ Grade Rationale
Original lab work product. Authoritative.
◆ Analyst Summary
Confirms prior STR attempt failed, justifying FGG approach.
Source: Marin County Sheriff's Office STR Test Report, ref. MCSO-DNA-2012-0044. · Released 2024-07-15 · J. Wilson
EV-00083Lab-providedRetrieved 2024-09-22
A1
Othram FGG Sequencing Report — Case OTH-2024-1102
Othram's full forensic-grade sequencing report and kinship inferences that drove the genealogical search.
◆ Grade Rationale
Authoritative lab work product; the foundation of the identification.
◆ Analyst Summary
Top kinship match at second-cousin range drove the identification of CD-00190.
Source: Othram Inc., FGG Sequencing Report, OTH-2024-1102, released 2024-09-22. · Released 2024-09-25 · J. Wilson
EV-00084Internal analysisRetrieved 2024-10-18
B2
Sequenxa Genealogy Tree Memo — CD-00190 Hypothesis
Internal Sequenxa genealogical reconstruction extending the kinship match into a candidate-bearing family line.
◆ Grade Rationale
Analyst-derived but tightly grounded in lab and public-records evidence.
◆ Analyst Summary
Translated the second-cousin kinship into a single candidate, enabling reference-DNA outreach and confirmation.
Source: Sequenxa Internal Memo SX-2024-0098-002, Vale M., Genealogy Tree Memo for CD-00190 Hypothesis, 2024-10-18. · Released 2024-10-22 · J. Wilson
EV-00085Agency-providedRetrieved 2024-11-04
B1
Family-Filed Missing-Person Report — Sonoma County SO, 2010
Original 2010 family-filed missing-person report; surfaced through the genealogical lead in EV-00084 and confirmed against the candidate identity.
◆ Grade Rationale
Contemporary law-enforcement record; close family reporter.
◆ Analyst Summary
Direct match to the genealogical hypothesis. Together with EV-00083, supported the formal identification.
Source: Sonoma County Sheriff's Office, Missing-Person Report SCSO-MP-2010-0317, filed 2010. · Released 2024-12-04 · J. Wilson
EV-00086Property recordRetrieved 2024-11-12
B3
Public Employment & Vehicle Records — Subject's Last Year (2010)
Compendium of public-record material — last documented employment, last-known vehicle from public DMV-style references, last public utility footprint.
◆ Grade Rationale
Records are authoritative individually; aggregation introduces interpretive risk that has been minimized through citation.
◆ Analyst Summary
Forms the substantive content of the post-ID Handoff Package — investigative context for the agency's case-closeout work.
Caveats
- No living-person PII is included; the compendium documents the subject's footprint, not associates' contact information.
Source: Sequenxa public-records compendium for SX-2024-0098, 2024-11-12. · Released 2024-12-12 · J. Wilson

◇ Appendix

APPENDIX A.2 — CANDIDATE PROFILES

CD-00190STRONGConfirmed
A1
Identified subject — confirmed via reference DNA
Reported age
28 yrs
Reported sex
Female
Last known location
Sonoma County, CA
Date last seen
2010-07-04
Profile
99/100
Geographic
92/100
Temporal
95/100
Sources: EV-00083 · EV-00084 · EV-00085 · Created 2024-10-18 · Last reviewed 2024-12-04