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FBI test data and notes for one-, two-, and five-microliter samples associated with Steven Avery's preserved blood tube
The FBI data and notes included a reported positive EDTA result for a one-microliter sample associated with Avery's preserved blood tube and a non-detection for a two-microliter sample. Arvizu cautioned that a volume-based detection claim also requires information about EDTA concentration.
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The questioning used the reported results to test whether a positive result from a one-microliter blood-tube sample established a general detection capability for unknown stains.