Former student Dzhokhar Tsarnaev has been convicted of the Boston Marathon bombing, which killed three people and injured 260 others in April 2013.
Here is a timeline of events surrounding the attacks, which were carried out by Dzhokhar and his older brother Tamerlan, who died after being run over by his sibling.
March 2011: Russian FSB intelligence security service gives the FBI information that Tamerlan Tsarnaev, of Cambridge, Massachusetts, is a follower of radical Islam.
June 2011: FBI closes investigation after finding nothing to link Tamerlan Tsarnaev to terrorism.
Late 2011: US officials add the Tsarnaevs' mother to a federal terrorism database after Russia contacts CIA with concerns they were religious militants about to travel to Russia. She later says she has no links to terrorism.
January 2012: Tamerlan arrives in Russia where he spends time in two predominantly Muslim provinces, Dagestan and Chechnya.
July 2012: Officials in Dagestan say Tamerlan applies for a new passport but never picks it up. Russian officials say they have him under surveillance but lose track of him after the death of a Canadian man who had joined an Islamic insurgency in the region.
July 17, 2012: Tamerlan returns to US
April 15, 2013: Bombs go off at the finish line of the Boston Marathon, killing three people and injuring more than 260 others.
April 16, 2013: Federal agents say the bombs were made from pressure cookers packed with explosives, nails and other shrapnel, but they do not know who detonated them or why.
April 18, 2013: Investigators release photos and video of two suspects and ask for public's help identifying them. Later that night, Massachusetts Institute of Technology police officer Sean Collier is shot to death in his cruiser, allegedly by Tamerlan and Dzhokhar Tsarnaev.
Prosecutors say they steal an SUV at gunpoint from a Cambridge gas station. The driver is held for around 30 minutes, then released unharmed.
April 19, 2013: Tsarnaevs exchange fire with authorities who have tracked them to Watertown. Tamerlan, who is run over by his younger brother, dies.
Dzhokhar escapes and at around 6am authorities tell residents of Boston and surrounding communities to stay indoors. All mass transit is shut down. That order is lifted around 6.30pm, just before authorities trace Dzhokhar to a Watertown backyard, where he is found hiding in a boat and taken into custody.
April 22, 2013: Dzhokhar Tsarnaev, injured in the shootout, is charged in his hospital room with using and conspiring to use a weapon of mass destruction.
April 30, 2013: Two friends of Dzhokhar's are charged with attempting to destroy evidence by disposing of a backpack and laptop computer taken from his room after they found he was a suspect in the bombing. Another is charged with lying to investigators.
May 9, 2013: Tamerlan Tsarnaev is secretly buried in Virginia after a week-long search for a cemetery willing to take his body.
July 10, 2013: Dzhokhar Tsarnaev pleads not guilty to 30 federal charges.
July 23, 2013: Marc Fucarile, the last survivor of the bombings, leaves hospital.
January 30, 2014: Prosecutors announce they will seek the death penalty against Dzhokhar.
April 15, 2014: Ceremonies and events are held to mark the anniversary of the attacks.
April 21, 2014: The 2014 Boston Marathon features a field of 36,000 runners, 9,000 more than 2013 and the second-biggest field in history.
June 18, 2014: Tsarnaev's lawyers file first of several requests to move the trial to Washington, DC.
September. 24, 2014: Judge grants delay and sets trial date of 5 January, 2015.
December 18, 2014: Tsarnaev appears in court for first time since his arraignment in July 2013.
January 5, 2015: Jury selection begins.
March 4, 2015: Tsarnaev's lead defence attorney, Judy Clarke, declares in opening statements: "It was him."
April 6, 2015: Prosecutors and defence present closing statements.
April 7, 2015: Jury begins deliberating verdicts.
April 8, 2015: Jury convicts Tsarnaev of all 30 charges, will consider whether he should face execution in penalty phase of trial
