2011 Russian government communication requesting investigation of Tamerlan; the defense offered it as contemporaneous corroboration, while the government disputed its reliability and probative value

Counsel disputed evidence of a 2011 Russian government communication requesting an American investigation of Tamerlan Tsarnaev. The defense argued that contemporaneous information countered a hindsight explanation of radicalization, while the government raised reliability, speculation, and cumulative-evidence objections. The broader dispute remained unresolved in this exchange.