Wexbridge Constabulary Case Review
CASE REF: WS-2018-03-15
Final Accusation Form

Which Sarah?

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Case File
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Wexbridge Constabulary Case Review has logged your submission against case WS-2018-03-15. A decision follows.

MG3 — CPS Decision
Charges Authorised

Status: Full Code Test met. Decision recorded by Crown Prosecutor Hugh Dimbledaw K.C.

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Case Review — Summary

Which Sarah? — the solution

Two women shared one name. The legal Sarah killed the man who had given her identity away; Rebecca arrived too late to save him, but in time to remove the proof.

This is a short summary. The full, illustrated case file — every exhibit, in detail — is in the solution PDF, downloadable at the end.

2014 — Rebecca Shaw becomes “R.S.”

Rebecca Shaw gave evidence in the Cross Securities fraud trial and faced threats because of it. Daniel Mercer had reported on the case and felt responsible for what followed. What began as temporary protection became something more: Daniel helped Rebecca live inside the records of a woman who already existed — Sarah Elizabeth Vale. He did not invent a person; he moved Rebecca into a real identity. Tenancies, employment, medical registration and utilities began carrying Sarah Vale’s name while describing Rebecca’s life. It was meant to last weeks. It lasted four years.

One medical record, two bodies: the historic shellfish allergy belongs to the legal Sarah; the 5 ft 7 height and the scar above the left eyebrow were recorded when Rebecca attended under Sarah’s name. That is why the file contradicts itself.

The bank — one account, two instruments

In November 2017 the account’s address and phone were changed by telephone banking to 18 Calder Close, and a one-time code provisioned card 4762 into a mobile wallet. A replacement physical card was later issued — but the original was never deactivated. Two live instruments: the physical card stayed with the legal Sarah; the wallet credential travelled with Rebecca. On the day of the death, the physical card bought fuel on Sarah’s car route while the wallet tapped a Wexbridge rail gate. One account. Two women. Two trails.

Rebecca’s failed meeting

Daniel arranged to meet Rebecca at Northgate Parkway at 13:45 — then decided not to attend. Rebecca’s rail movements place her far from the study across the whole death window.

  • 13:43Arrives Northgate Parkway (approx.)
  • 13:44Withheld call to Daniel — declined
  • 13:47Second withheld call — declined
  • 13:52Return journey begins

The killing

The legal Sarah followed the car route: leaving the Merewick Garden Hotel at 09:42, fuel at 11:58 on card 4762, reaching Harlow Row shortly after 14:12. Daniel died between 14:25 and 14:45 from a single close-range blow with the brass paperweight from his own desk. The desk clock stopped at 14:37. The strike is consistent with a left-handed assailant — Sarah A is left-handed; Rebecca is right-handed. At 14:55 Sarah’s handset created the recovered photograph of the study. Car route, handset, death window, handedness and a later lie all point to the same person: Sarah A killed Daniel Mercer.

Rebecca arrives too late

Rebecca exited Wexbridge Central at 15:21 and reached the address at 15:32 — nearly an hour after death. She entered through the unsecured door, found Daniel, and found the records that could expose everything. She did not kill him. But she altered the scene: she opened the drawer, searched the study, and stacked the papers as she stripped the R.S./S.V. document wallet. Her fingerprint, a gold fibre and the disturbed room tie her to that post-death search. Among the papers she carried off was Sarah’s handwritten route note — possession is not authorship.

The two denials

Both women were asked if they went to Harlow Row that day. Both said no. One denial hides a killing; the other hides four years of a borrowed life. Sarah’s second, specific lie — “my phone was in the car,” when her handset was at the property at 14:55 — is the one that breaks.

The trap: a clue may be true, genuine, and still attached to the wrong Sarah. The detainee really was the “real” Sarah Vale — and she was still the killer.
One Open Question

Murder, or manslaughter?

A paperweight from his own desk. One blow, in an escalating confrontation. Nothing in the file proves she arrived intending to kill. Would you pursue the murder conviction — or accept the manslaughter plea?

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Case Closed

Thank you for working the file

Sarah A killed Daniel Mercer. Rebecca Shaw arrived after his death and removed the identity papers. The name was shared; the actions were not.


What you read here is a summary. The full case file — every exhibit, illustrated and in full detail — is in the solution document.

Download the full solution (PDF)
The Next Case

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