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The Bloodstained Jacket in Court, Explained

The prosecution puts Vole's jacket on show: bloodstains of type O, the same group as the murdered woman, and someone tried to wash them out. Wilfrid answers not by denying the blood but by producing a certificate — Vole is himself a type O blood donor — turning the damning stain into a household accident.

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Key moments

Start here, then watch the full scene
  1. Only Facts, No Surmise

    0:54–1:38
    43s
  2. The Blood Donor Certificate

    2:00–3:16
    76s

The Bloodstained Jacket in Court, explained

What happens

In court, the inspector presents the jacket found in Vole's flat. Tests show the stains are human blood, type O — the same group as Mrs French — and someone had tried to wash them out. Wilfrid then produces a certificate proving Vole is a blood donor with type O blood, so the stains could come from his own cut wrist. He also questions the burglar theory.

What's really going on

Forensics look like the prosecution's cleanest weapon: blood of the victim's own group, on the accused's jacket, half-washed. Wilfrid's response is the film's method in miniature — accept the fact and change what it means. He does not deny that the stains are human blood; he makes the same fact harmless by showing the accused shares that blood type. The burglar theory, by contrast, gets him nowhere: "Let us not surmise, Sir Wilfrid, but confine ourselves to facts," the judge cuts in, and the gloves argument dies with it. Then comes the more dangerous thread: the knife and the wrist. Wilfrid's question about whether the cut was "an accident or done deliberately after the murder to account for the bloodstains" is objected to and withdrawn — but the doubt has already been planted.

Key lines & what they mean

“Let us not surmise, Sir Wilfrid, but confine ourselves to facts.”
The judge rules out speculation about the imaginary burglar and tells the court to stick to evidence; a reminder of how a real trial limits argument.
“is there anything to show whether it was an accident or done deliberately after the murder to account for the bloodstains?”
Wilfrid suggests the wrist wound might have been self-inflicted after the killing to explain the blood — a damaging idea he is forced to withdraw.
“I have here a certificate stating that Leonard Stephen Vole is a blood donor at the North London Hospital.”
The defence's counter-move: documentary proof that Vole's own blood is type O, so the stains are as consistent with innocence as with guilt.
“Did the prisoner's wife show you a knife and tell you that her husband had cut his wrist while slicing bread?”
Wilfrid establishes that the knife and the wife's explanation both exist, setting up the argument that the wound was a kitchen accident.

Theme

  • Justice — The scene shows a trial built on physical evidence, where the same blood type can convict or free the accused.
  • Deception — A stain that looks like guilt is reframed as an accident, and a withdrawn question still leaves doubt in the jury's mind.

What this chapter teaches

Teaching points

Review right after watching
My level1/6

A1–C2 is the CEFR scale. Cards above the level you pick fade, and playback will not auto-pause on them.

Witness for the Prosecution: your progress

Chapter 16 of 27 · about 41 min to go

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Takeaways

What you walk away with
  1. Blood group evidence can cut both ways in court.
  2. A polite phrase can end questioning as firmly as a shout.
  3. The knife test plants doubt about how the cut happened.
  4. One certificate can outweigh a room full of suspicion.

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Questions, then the lines
Why is the type O blood evidence so damaging?

Because the blood on the jacket matches the victim's group, it lets the prosecution suggest the stains came from the murder. A matching blood type alone is not proof, but it is strong circumstantial evidence.

How does Wilfrid answer the blood evidence?

He produces a certificate showing Vole is a blood donor and his own blood is type O. If the accused shares the victim's blood type, the stains could come from his cut wrist rather than the crime.

What was the burglar theory, and why did it fail?

Wilfrid argued a burglar might have entered, struck Mrs French and fled. The judge rejected the guesswork, saying the court must confine itself to facts, and the gloves argument went nowhere.

Why did Wilfrid withdraw his last question?

He asked whether the wrist cut was an accident or made deliberately after the murder to explain the blood. It drew an objection, so he withdrew it — but the suggestion had been heard by the jury.

What does "stand down" mean in court?

It means a witness may leave the witness box. After Wilfrid finishes with the inspector, the court tells him he may stand down, and the next witness, Janet McKenzie, is called.