Michael Macias explained FBI laboratory handling of bombing evidence on Day 30 and clarified the separate numbering of Q122 and Q122.1. The Court then admitted the corresponding Government Exhibits 136 and 137.
WitnessFBI
Michael Macias
FBI laboratory employee in Quantico with a doctorate in chemistry.
Appeared2015 Federal Trial
48 lines·1 proceeding·1 mention
About
Michael Macias testified for the prosecution on Day 30 about the FBI laboratory's handling of Boston Marathon bombing evidence. A physical scientist in the explosives unit, he said he was primarily responsible for intake and described receiving, photographing, numbering and routing items for examination.
Under Steven D. Mellin's questioning, Macias explained laboratory identifiers, examination plans, custody transfers and resealing, using an exhibit container to illustrate the process. He also described physical measurements and analysis intended to determine whether submitted evidence could support reconstruction of an explosive device and identification of components from their markings.
When Judy Clarke and the Court sought clarification about whether the can contained one exhibit or two, Macias explained that Q122.1 had been separated from Q122. The Court admitted Government Exhibit 136 as Q122 and Exhibit 137 as Q122.1. Macias identified Edward Knapp as responsible for developing the explosives-unit report. The defense asked no questions.
Trial Record (1)
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