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The Detective’s Desk

HARD · CASE FILE

The last person in the ledger

Hard · CEDAR APPOINTMENT ROOM

Four people signed in at four fixed appointments. Reconstruct the complete order before identifying the last signature. The archive retained the competing reconstructions in separate packets. Rebuild their custody events, identify the proposal supported by the analytical records, then name that packet’s recorded handler. The packet events form a separate ordered register; do not substitute a calculated clock time for a review-slot label.

Investigate this case

Read the case file below, or open the interactive desk to examine records, keep notes and submit your reasoning. These are the case materials, without the solution.

Your assignment

Who handled the packet containing the supported reconstruction?

People and accounts

Inez Lane

Recorded packet handler

“Establish my packet, location and event from the verified custody record.”

Oren Lake

Recorded packet handler

“Establish my packet, location and event from the verified custody record.”

Milo West

Recorded packet handler

“Establish my packet, location and event from the verified custody record.”

Vera Pine

Recorded packet handler

“Establish my packet, location and event from the verified custody record.”

Jules Ash

Recorded packet handler

“Establish my packet, location and event from the verified custody record.”

Inez Shore

Recorded packet handler

“Establish my packet, location and event from the verified custody record.”

Case records

Read each record on its own terms. A claim made by a person is different from a fact established by an independent record.

VERIFIED RECORD C

Position exclusion

Cora did not sign at 09:00, and Dev did not sign at 09:10. All four appointments were used, with no duplicate signers.

Place the immediate pair where the remaining ordering can still hold.

CONTEXT NOTE

Pen colour

Two signatures use blue ink. No name-to-ink correspondence is established.

This describes the setting; it does not establish the requested result.

VERIFIED RECORD A

Appointments

Aria, Beni, Cora and Dev each occupy exactly one of 09:00, 09:10, 09:20 and 09:30. Aria is immediately after Cora.

Keep the Cora–Aria pair consecutive.

VERIFIED RECORD B

Relative statement

Beni signs before Dev, but not necessarily immediately before. This relationship is independently verified.

Use relative order without inventing adjacency.

RECONSTRUCTION RECORD

Packet proposal index

This is the same investigation’s packet custody record. There are 6 ordered events, labelled Review 1, Review 2, Review 3, Review 4, Review 5, Review 6. Each listed person, location and item occurs exactly once. These slots describe record order, not times from the analytical problem. Each packet contains the proposed reconstruction shown in the index. Solve the original three analytical records to identify the supported proposal, then trace its packet to its handler. Control packets have no proposal and cannot be the target.

  • The event handled by Inez Lane occupies slot 5 (Review 5).
  • The event handled by Jules Ash and the event at Reading desk are exactly 5 positions apart, with 4 intervening events; this alone gives no direction.
  • The event handled by Milo West occurs earlier than the event involving “Packet Amber”, without claiming they are consecutive.
  • The event at Intake counter is the same event as the event involving “Packet Cedar”.
PacketProposed analytical answer
Packet AmberCora
Packet BirchBeni
Packet CedarDev
Packet DuneAria
Packet ElmControl packet: no analytical proposal
Packet FernControl packet: no analytical proposal

Use each column’s choices exactly once. Verified relationships govern the board; proposed answers and later recollections do not override them.

RECONSTRUCTION RECORD

Custody sequence

The relationships below were verified independently. “A immediately before B” means A is in the row directly above B, with no row between them. Keep relationships from all worksheet sources together.

  • The event at Seal station occupies slot 5 (Review 5).
  • The event handled by Oren Lake and the event at Dispatch shelf are exactly 3 positions apart, with 2 intervening events; this alone gives no direction.
  • The event handled by Vera Pine and the event involving “Packet Birch” are exactly 2 positions apart, with 1 intervening event; this alone gives no direction.
  • The event at Review bench and the event involving “Packet Amber” are exactly 3 positions apart, with 2 intervening events; this alone gives no direction.

Use each column’s choices exactly once. Verified relationships govern the board; proposed answers and later recollections do not override them.

RECONSTRUCTION RECORD

Cross-check and accounts

The relationships below were verified independently. “A immediately before B” means A is in the row directly above B, with no row between them. Keep relationships from all worksheet sources together. The following later recollections are claims to test, NOT verified facts. Exactly one disagrees with the reconstructed board; this alone is not proof of deliberate deception.

  • The event involving “Packet Amber” and the event involving “Packet Fern” are exactly 4 positions apart, with 3 intervening events; this alone gives no direction.
  • The event handled by Vera Pine occurs earlier than the event involving “Packet Fern”, without claiming they are consecutive.
  • The event handled by Milo West occurs immediately before the event involving “Packet Dune” (consecutive rows, with no event between them).

Use each column’s choices exactly once. Verified relationships govern the board; proposed answers and later recollections do not override them.

Questions to resolve

Who signed at 09:30?

Match every recorded item to its handler or reviewer.

Who handled the first recorded event?

Use the interactive case desk to select your finding and cite the records that support it. The answer is checked there, and your progress stays in your browser.

Build your finding

Compare the records with each account. Work out what the evidence establishes, then separate that finding from anything it does not prove.

Open the interactive case More Hard case files