Dzhokhar Tsarnaev was captured and remains in a prison hospital. He has been charged with using a weapon of mass destruction and faces a potential death sentence if convicted.
The state medical examiner ruled that Tsarnaev died from gunshot wounds and blunt trauma to his head and torso, and authorities have said his brother ran him over in a chaotic getaway attempt.
Tsarni has denounced the acts his nephews are accused of committing and said they brought shame to the family and the entire Chechen ethnicity. The brothers are ethnic Chechens from Russia who came to the United States about a decade ago with their parents. Both parents returned to Dagestan last year.