Continuity Sample
Definition
A portion of the original exhibit retained in the laboratory after analysis, so that an independent analyst can re-examine it if the result is challenged. Destruction of the continuity sample must be documented and justified.
- Held by
- The laboratory, after primary analysis
- Purpose
- Allows independent re-examination
- Disposal
- Must be documented and justified
Common questions
Why keep a continuity sample rather than use the entire exhibit in one analysis?+
Retaining a portion preserves the defendant's right to have an independent analyst re-test the material if the prosecution's result is disputed, rather than relying solely on one laboratory's conclusion.
Can a continuity sample ever be destroyed before trial?+
Yes, but only where destruction is recorded and justified, for example when the original quantity was too small to divide, and the justification itself can be challenged in court.
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