| FILE - This file photo provided Friday, April 19, 2013 by the Federal Bureau of Investigation shows Boston Marathon bombing suspect Dzhokhar Tsarnaev. A federal grand jury in Boston returned a 30-count indictment against Tsarnaev on Thursday, June 27, 2013, on charges including using a weapon of mass destruction and bombing a place of public use, resulting in death. | 
     BOSTON     (AP) 
-- 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 to kill.
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.
Three
 people were killed and more than 260 wounded by the two pressure-cooker
 bombs that went off near the finish line of the marathon on April 15.
Dzhokhar Tsarnaev was captured four days later, hiding in a boat parked in a backyard in Watertown, Mass.
According
 to the indictment, he scrawled messages on the inside of the vessel 
that said, among other things, "The U.S. Government is killing our 
innocent civilians," "I can't stand to see such evil go unpunished," and
 "We Muslims are one body, you hurt one you hurt us all."
The
 Tsarnaev brothers had roots in the turbulent Russian regions of 
Dagestan and Chechnya, which have become recruiting grounds for Muslim 
extremists. They had been living in the U.S. about a decade.
But
 the indictment made no mention of any larger conspiracy beyond the 
brothers, and no reference to any direct overseas contacts with 
extremists. Instead, the indictment suggests the Internet played an 
important role in the suspects' radicalization.
Before
 the attack, according to the indictment, Dzhokhar Tsarnaev downloaded 
onto his computer the summer 2010 issue of Inspire, an online 
English-language magazine published by al-Qaida. The issue detailed how 
to make bombs from pressure cookers, explosive powder extracted from 
fireworks, and lethal shrapnel.
He also 
downloaded extremist Muslim literature, including "Defense of the Muslim
 Lands, the First Obligation After Imam," which advocates "violence 
designed to terrorize the perceived enemies of Islam," the indictment 
said.
Another tract downloaded included a 
foreword by Anwar al-Awlaki, an American propagandist for al-Qaida who 
was killed in a U.S. drone strike in 2011.
U.S.
 Attorney Carmen Ortiz of Massachusetts said Attorney General Eric 
Holder will decide whether to pursue the death penalty against Tsarnaev,
 who will be arraigned on July 10.
The 
indictment assembled and confirmed details of the case that have been 
widely reported over the past two months, and added new pieces of 
information.
For example, it corroborated 
reports that Tamerlan Tsarnaev bought 48 mortar shells from a Seabrook, 
N.H., fireworks store. It also disclosed that he used the Internet to 
order electronic components that could be used in making bombs.
The
 papers detail how the brothers then allegedly placed knapsacks 
containing shrapnel-packed bombs near the finish line of the 26.2-mile 
race.
The court papers also corroborated 
reports by authorities that Dzhokhar Tsarnaev contributed to his 
brother's death by accidentally running him over with a stolen vehicle 
during a shootout and police chase.
The 
charges cover the slaying of Massachusetts Institute of Technology 
police officer Sean Collier, who authorities said was shot in the head 
at close range in his cruiser by the Tsarnaevs, who tried to take his 
gun.
In addition, prosecutors said that during
 the carjacking, the Tsarnaevs forced the motorist to turn over his ATM 
card and his password, and Dzhokhar withdrew $800 from the man's 
account.
At the same time the federal 
indictment was announced, Massachusetts authorities brought a 15-count 
state indictment against Dzhokhar over the MIT officer's slaying and the
 police shootout.