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Dzhokhar Tsarnaev— Case Archive
evidenceevidencedocument2015 Federal TrialMcCollam's laboratory reportMcCollam's lengthy laboratory report identified numerous items examined or tested for explosive residues in the Boston Marathon investigation. He consulted it to refresh his recollection about pyrotechnic residues found in filters identified with 410 Norfolk Street, Apartment No. 3. On cross-examination, he explained that collection locations in the report came from information supplied to the laboratory, not his firsthand knowledge.
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McCollam's laboratory report

McCollam's lengthy laboratory report identified numerous items examined or tested for explosive residues in the Boston Marathon investigation. He consulted it to refresh his recollection about pyrotechnic residues found in filters identified with 410 Norfolk Street, Apartment No. 3. On cross-examination, he explained that collection locations in the report came from information supplied to the laboratory, not his firsthand knowledge.

2 proceedings2 mentions1 trial

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McCollam explained that the analyses led him to conclude that materials were consistent with the deflagration of pyrotechnic materials. The court excluded a residue-proportionality opinion that the report did not contain.

Trial Record (2)