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Investigation dossier

BRC-7E

Stairwell Echo Archive

A stairwell stack where recorded voices answer questions before they are spoken and low-frequency echoes bleed between landings.

Open Routine Threat 46 · Elevated Class Amber Watch Monitor State published

Quick facts

Lead
R. Hale
Opened
1998-02-04
Closed
—
Published
2026-04-14 03:14:33
First reported
1998-02-04 19:44:00
Last activity
1998-02-04 19:52:00

Response posture

ObserveMonitorStack
Pattern
Irregular, strongest after stillness
Threat band
Elevated
Access
public

Archive note

The archive has released a partial transcript because the main recording remains under acoustic review.

stairwellechotranscript

Evidence total

1

Verified integrity

1

Restricted items

0

Incident entries

2

Evidence posture

Public
1
Internal
0
Restricted
0
Compromised
0

Chain summary

First entry
1998-02-04 19:44
Last entry
1998-02-04 19:52
Transcript excerpts
1
Highest sequence
10

Capture range

First capture
1998-02-04 19:52:00
Last capture
1998-02-04 19:52:00
Classification
Amber
Closure code
—

Environmental signature

Concrete damp, distant ventilation rumble, and clipped reverb that repeats at impossible timings.

Route forensics

Echoes intensify on descents beyond landing seven.
Magnetic compasses lag one landing behind movement.

Containment notes

No solo descents.
Audio teams must record with redundant devices.

Incident chain

  1. 1998-02-04 19:44
    Entry

    Recorder team entered landing stack.

  2. 1998-02-04 19:52
    Echo

    Response captured before prompt.

Evidence review

Attached evidence

Search related evidence
PublicVerifiedSeq 10

SEC-7-TX-03

Landing Seven Transcript

Transcript of the first documented pre-echo response on landing seven.

Type
Transcript
Captured
1998-02-04 19:52:00
Room
Landing Seven
Storage
Transcript Box C

Transcript cross-checked against two duplicate copies.

Explicit relationship graph

No explicit links have been recorded for this casefile.

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Comments / theories / discussion

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