← All EvidenceProceduralPolymer and Tape Comparisons: Exclusion Motion Denied
Testimony References
Proposed expert testimony comparing the class characteristics of tapes and sealants
The proposed expert testimony compared class characteristics of tapes and sealants from Boylston Street with materials from 410 Norfolk Street, without identifying particular rolls or sealants as their source. The court denied exclusion based on that limited proposal, treating the comparison as a relevance issue rather than source-specific testimony implicating Daubert. The defense maintained that even the Level 3 association lacked scientific support and risked being mistaken for a conclusive match.
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The government proposed the limited comparison to help explain the devices' construction materials and permit an inference concerning construction at Norfolk Street, while expressly disclaiming source-specific identification or proof from the comparison alone that the defendant made the bombs.