BOSTON — Boston Marathon suspect Dzhokhar Tsarnaev downloaded bomb-making instructions from an al-Qaida magazine, gathered online material on Islamic jihad and martyrdom, and later scrawled anti-American messages inside the boat where he lay wounded, a federal indictment charged Thursday.
The 30-count indictment contains the bombing charges, punishable by the death penalty, that were brought in April against the 19-year-old Tsarnaev, including use of a weapon of mass destruction resulting in death.
It also contains many new charges covering the slaying of an MIT police officer and the carjacking of a motorist during the getaway attempt that left Tsarnaev's older brother, Tamerlan, dead.
"Tamerlan Tsarnaev's justice will be in the next world, but for his brother, accountability will begin right here in the district of Massachusetts," Suffolk District Attorney Daniel Conley, whose jurisdiction includes Boston, said at a news conference with federal prosecutors.
The indictment provides one of the most detailed public explanations to date of the brothers' alleged motive — Islamic extremism — and the role the Internet may have played in influencing them.