ILLUSTRATIVE · FICTIONAL CASE · SYNTHETIC DATA · INVESTIGATIVE LEAD, NOT PROOF OF GUILT
Evidenx does not score. This card presents an investigative lead and its supporting context. It is not an identification or a determination of guilt; the individual referenced is presumed innocent. Weighing the evidence is for investigators, prosecutors, and the court.
Step 1 of 8Scope & signal reduction
What the reopened file contained
A 1994 homicide file was reopened in 2026. Six categories of evidence were examined and reduced to the small set of items carrying probative new results. As elsewhere, nothing is discarded. Every report and item remains an observation; this layer organises and correlates, it does not conclude.
31
retained evidence items
→
1
item with a new DNA result (Item 14)
→
3
explanations tested
Original case file
1994 file
reports & canvass
Evidence inventory
31 items
retained items
Forensic biology
re-tested 2026
STR / IGG
Firearms / toolmarks
no entry
NIBIN
Records / telephony
partial
historic
Step 2 of 8The finding
An investigative lead, not an identification
A single-source STR profile was developed from retained evidence
Item 14 and, via investigative genetic genealogy (IGG),
associated with an individual, referred to here as Individual A. This is an
investigative lead, a biological association between an item and a person. It is
not an identification of an offender and
not a determination of guilt.
association viaSTR profiling (single source)investigative genetic genealogy
evidence inforensic biology evidence inventory original file
An association is a lead, not proof. Individual A is presumed innocent. Whether this evidence supports any further step is for investigators, prosecutors, and the court to decide, never this system.
Step 3 of 8Corroborating context
Correlated facts for the investigator to interpret
Chain of custody
provenance
Item 14 shows an unbroken chain of custody from 1994 collection through 2026 re-testing; storage conditions logged. The association rests on an item whose handling is documented.
Geographic / temporal
spatial
Individual A's 1994 address of record falls within the original neighbourhood canvass area; presence in the area at the relevant period is recorded but not otherwise characterised.
Prior records
identity
A records association places Individual A and the decedent in the same community setting; the nature of any relationship is not established from the file.
Each item is a neutral fact plus why it was surfaced. The system does not infer a relationship, motive, or presence at the incident. It places the correlated records in front of the investigator.
Step 4 of 8Timeline
Original investigation & reopening
1994-07-31 Homicide reported; scene processed; evidence collectedincident
1994-08 Item 14 retained; serology inconclusive by 1994 methodsevidence
1996 Original person of interest investigatedcase
1996 Original person of interest excluded on later testingforensics
1996 → 2026 Case inactive (cold)case
2026-02 File reopened; retained items inventoriedcase
2026-04 STR single-source profile developed from Item 14forensics
2026-04 IGG association to Individual A (lead)forensics
Step 5 of 8Alternative explanations considered
Innocent explanations, tested against the evidence
Original person of interest
Investigated in 1996 and excluded by later STR testing against retained evidence. The reopening does not revive this line.
Innocent / secondary DNA transfer
Whether the Item-14 profile reflects direct contact or secondary transfer is not yet distinguished; it depends on the biological substrate, quantity, and location on the item, with interpretation pending (see next page). This alternative remains open.
Known / consensual prior contact
If Individual A and the decedent had lawful prior contact, presence of the profile may have an innocent explanation. Not addressed by the current file; relationship records pending.
Competing, innocent explanations are held side by side with the lead and tested against what the evidence does and does not distinguish, the same alternative-hypotheses / expected-but-absent machinery used in the DFIR layer. Surfacing the innocent explanations is a feature, not an omission.
Step 6 of 8Expected but not yet collected
Absence and limits, recorded honestly
Confirmatory reference sample (Individual A)
not_collected
A direct buccal reference for confirmatory single-source comparison has not been obtained; any collection would require appropriate legal authority. Its absence carries no weight for or against any explanation.
DNA mixture / transfer interpretation
not_collected
Substrate, quantity, and transfer-mode interpretation for Item 14 is pending laboratory review; needed to address the secondary-transfer alternative.
Original biological extract for re-test
absent
Portions of the 1994 extract were consumed by earlier testing and are no longer available. a genuine, recorded limitation on further work.
Key witness (deceased)
not_collected
A 1994 witness is deceased; their account cannot be revisited. Recorded as a collection-scope fact, weighed against nothing.
absent (searched, not found / no longer available) is evidentiary; not_collected (never gathered, or not yet lawfully obtainable) is a collection-scope fact and is never weighed against a person. In a justice context this distinction is not a nicety. It is fundamental.
Step 7 of 8Understanding
Bounded & factual: a lead, not a verdict, no score
A single-source DNA profile from retained Item 14 has been associated, via investigative genetic genealogy, with Individual A, an investigative lead supported by an intact chain of custody and two correlating records. The original person of interest was previously excluded. Innocent explanations (secondary transfer; lawful prior contact) remain open pending laboratory interpretation and records review, and a confirmatory reference sample has not been obtained. This is a lead for the investigation to pursue under due process. It is not an identification, not a determination of guilt, and carries no score. Individual A is presumed innocent.
1 single-source association (lead)innocent explanations: 2 openevidence gaps: 3 not collected, 1 no longer available
Step 8 of 8Conclusion
The call is the investigator's. Evidenx stops at understanding
Evidenx has taken the reopened case file and its evidence to
data, to
information, to
understanding, the structured, corroborated, bounded picture on the preceding pages. It stops here.
The conclusion is the investigator's to make.data → information → understanding → their conclusion
Evidenx has not decided, and does not decide: guilt, identity of an offender, or a charging decision. There is no score, rank, or confidence value in this card.
For the investigator to determine:
- Whether the surfaced lead is worth investigative resource in this case.
- Which innocent explanations survive scrutiny.
- Whether degraded or missing evidence can still be recovered or retested.
- The investigative next step, and any referral for a charging decision.
The investigator determination
Left intentionally blank. This is the investigator's conclusion to record. Evidenx provides the evidence, not the verdict.