Matthew Levitt

Matthew Levitt testified for the prosecution on Day 37 and Day 38, comparing extremist publications and audio with the writing found inside the boat. He described his counterterrorism and intelligence experience and explained that his assignment was to provide historical and thematic context. He took the evidence supplied to him at face value rather than independently verifying it. The court permitted testimony within the scope of his report but declined to grant blanket expert qualification, while cautioning the prosecution about unfair prejudice.

On direct examination, Levitt described decentralized extremist activity and propaganda encouraging violence without organizational command or direct contact. He identified themes of collective defense, martyrdom, religious reward, and promised victory in the boat writing and extremist literature. He also described rhetoric treating civilians as responsible for government conduct and presenting attacks as reprisals. He distinguished these interpretations from Islam generally and acknowledged that common religious expressions were not inherently extremist. His comparisons identified thematic overlap, not a demonstrated sequence by which the writer adopted the ideas. He qualified readings where bullet holes interrupted the text. During continued direct examination, the court agreed with Bruck's objection to Levitt's interpretation of a plain-English phrase.

On cross-examination, Bruck tested whether those parallels established independent radicalization rather than influence from another person. Levitt said he could not know the defendant's thoughts and allowed that others could have conveyed similar ideas. He acknowledged that his assignment did not identify the radicalizer or verify file provenance, that he had received no Tamerlan computer files or recordings, and that the prosecution had not asked him to factor Tamerlan's overseas travel into his analysis. He also acknowledged language and disciplinary limits and distinguished religious lectures and scriptural expressions from inherently extremist content.

Bruck additionally questioned Levitt's compensation and retweets of testimony coverage. On redirect, Levitt acknowledged that he should have waited before tweeting and clarified that exposure to radical ideas does not necessarily lead to violence. He maintained that violent action requires some motivational stage, while recognizing that many people encounter such ideas without acting violently.