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Dzhokhar Tsarnaev— Case Archive
evidenceevidencetestimony2015 Federal TrialJay Giedd's testimony on adolescent brain developmentIn the Day 63 closing argument, Clarke described Giedd's testimony as explaining the biological basis of adolescent development and uneven decision-making. She expressly acknowledged that averages and brain scans could not establish how mature any particular individual was.
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Jay Giedd's testimony on adolescent brain development

In the Day 63 closing argument, Clarke described Giedd's testimony as explaining the biological basis of adolescent development and uneven decision-making. She expressly acknowledged that averages and brain scans could not establish how mature any particular individual was.

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Clarke invoked the adolescent-development testimony in her sentencing argument about youth as mitigation, while acknowledging that brain scans could not determine an individual's maturity.

Trial Record (1)

2015 Federal Trial

Day 63