Assistant U.S. Attorney Aloke Chakravarty, one of Dzhokhar Tsarnaev’s prosecutors, gives his closing arguments on Monday.

Lead prosecutor William Weinreb delivers opening statements Wednesday at the Moakley U.S. Courthouse while 21-year-old Dzhokhar Tsarnaev sits between his attorneys. Tsarnaev could be sentenced to death if convicted.

Massachusetts chief medical examiner Henry Nields presents the tattered clothes of 8-year-old Martin Richards, who died in the Boston Marathon bombings.