October Term 2008 · Docket 07-591

Must a lab analyst testify to prove a drug test result?

The dispute centers on whether a written drug test report requires the analyst to appear in court for cross-examination.

Official caption
Melendez-Diaz v. Massachusetts
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Official Transcript

Verified source milestones

  1. — An official oral-argument transcript was verified.
  2. — An official oral-argument transcript was verified.

The arguments, in order

This case may have been argued more than once. Each entry below uses that session's official transcript. Later arguments do not erase earlier ones.

  1. Argument 1 ·

    What happened at the argument

    Fisher stated the Confrontation Clause protects against trial by affidavit.

    Schertler argued the Confrontation Clause does not apply to machine-generated results.

    Coakley claimed the drug certificates are not testimonial statements.

    Kennedy questioned if a lab report is distinct from a police report.

    Read the official transcript for this argument · Official argument details

    Sources used for this argument breakdown

A citizen's guide to the whole case

What this case is about

Jeffrey Fisher argues the Confrontation Clause bans trial by affidavit. He says the right to confront witnesses is core to fair trials. The state argues the report is a machine-generated result. It is not a witness statement. The state says the defendant can call the analyst if needed. This avoids forcing the state to produce the analyst.

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How the case got here

The Supreme Court heard oral argument in this case on November 10, 2008.

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What each side wants

Fisher wants the analyst to testify in court.

The state wants to admit the report without the analyst.

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What each side says

Fisher argues the report is a testimonial statement.

The state argues the report is a non-testimonial record.

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What the justices asked

Justice Kennedy asked if a lab report differs from a police accident report.

Justice Roberts asked if a lab supervisor could testify instead of the analyst.

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Why it matters

This case defines the scope of the right to confront witnesses. It determines whether lab reports require live testimony. The outcome affects how prosecutors prove scientific evidence in criminal trials. It shapes the balance between trial efficiency and defendant rights.

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What happens next

This article currently covers the argument record. Use the official docket link for later case activity.

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Official Court provenance

Official docket and case history · Official Supreme Court oral-argument detail page

Title and summary sources

Revision history

  1. Revision 1 · Official Transcript ·

    Correction: Rewritten to the concise citizen-facing editorial standard.

  2. Revision 2 · Official Transcript ·

    Correction: Migrated to the dated official Court activity contract without model use.

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