Timeline of events in 2013 Boston Marathon bombing

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Dzhokhar Tsarnaev Found Guilty on Boston Bombing Charges

A timeline of events related to the Boston Marathon bombing, which killed three people and injured 260 others on April 15, 2013. A federal jury on Wednesday convicted Dzhokhar Tsarnaev, who defenders say was influenced by his older brother, Tamerlan.

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March 2011: Russian FSB intelligence security service gives 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.

Sept. 12, 2011: Bodies of three men are found in Waltham, Massachusetts, with their throats slit and marijuana sprinkled over them.

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Timeline of events in 2013 Boston Marathon bombing
Accused Boston Marathon bomber Dzhokhar Tsarnaev (L) is shown in a courtroom sketch next to Judge George O'Toole on the first day of jury selection at the federal courthouse in Boston, Massachusetts January 5, 2015. O'Toole on Monday began the process of selecting the jury that will hear the trial of Tsarnaev, telling the first of some 1,200 prospects to read no more news accounts about the deadly blasts. Tsarnaev could get the death penalty if convicted of killing three people and injuring more than 260 others by detonating a pair of homemade bombs placed amid a crowd of thousands of spectators at the race's finish line on April 15, 2013. REUTERS/Jane Flavell Collins (UNITED STATES - Tags: CRIME LAW)
A memorial for the victims of the Boston Marathon bombings and its aftermath stands near the race's finish line, on the second day of jury selection in the trial of accused Boston Marathon bomber Dzhokhar Tsarnaev in Boston, Massachusetts January 6, 2015. The victims remembered are MIT police officer Sean Collier, Krystle Campbell, Lingzi Lu and Martin Richard. Tsarnaev could get the death penalty if convicted of killing three people and injuring more than 260 others by detonating a pair of homemade bombs placed amid a crowd of thousands of spectators at the race's finish line on April 15, 2013. REUTERS/Brian Snyder (UNITED STATES - Tags: CRIME LAW)
BOSTON - MARCH 9: An artist's sketch of Dzhokhar Tsarnaev hangs on the wall outside the Moakley courthouse for videographers to record during the Marathon bombing trial. (Photo by Lane Turner/The Boston Globe via Getty Images)
A courtroom sketch shows accused Boston Marathon bomber Dzhokhar Tsarnaev (C) sitting with his attorneys on the first day of his trail at the federal courthouse in Boston, Massachusetts March 4, 2015. REUTERS/Jane Flavell Collins (UNITED STATES - Tags: CRIME LAW)
A plaid backpack Is seen in this undated handout evidence photo provided by the U.S. Attorney's Office in Boston, Massachusetts on March 25, 2015. FBI Special Agent Kenneth Benton testified that he and fellow agents searched the landfill after a college friend of Tsarnaev's took the plaid backpack from the defendant's dorm room and tossed it into a dumpster. REUTERS/U.S. Attorney's Office/Handout FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS
BOSTON - MARCH 11: Members of the media film evidence from the Dzhokhar Tsarnaev Boston Marathon bombing trial on display at the Moakley Federal Courthouse in Boston on March 11, 2015 . (Photo by John Blanding/The Boston Globe via Getty Images)
BOSTON, MA - MAY 13: TV cameras line the entrance of John Joseph Moakley United States Courthouse as the Boston Bomber Trial enters jury deliberations in the sentencing phase of the trail on May 13, 2015 in Boston, Massachusetts. Dzhokar Tsarnaev was found guilty on all 30 counts related to his involvement in the 2013 bombing, which resulted in three deaths and over 250 injuries. (Photo by Scott Eisen/Getty Images)
BOSTON, MA - MAY 13: Members of the legal defense team for Boston Marathon bombing suspect Dzhokhar Tsarnaev, including William Fick (from left), Miriam Conrad, Judy Clarke and Timothy Watkins leave John Joseph Moakley United States Courthouse after the beginning of jury deliberations in the sentencing phase of the Boston Bomber Trial on May 13, 2015 in Boston, Massachusetts. Dzhokar Tsarnaev was found guilty on all 30 counts related to his involvement in the 2013 bombing, which resulted in three deaths and over 250 injuries. (Photo by Scott Eisen/Getty Images)
BOSTON, MA - MAY 13: Members of the public line up to enter John Joseph Moakley United States Courthouse as the Boston Bomber Trial is slated to start closing arguments on May 13, 2015 in Boston, Massachusetts. Dzhokar Tsarnaev was found guilty on all 30 counts related to his involvement in the 2013 bombing, which resulted in three deaths and over 250 injuries. (Photo by Scott Eisen/Getty Images)
BOSTON, MA - MAY 11: A protester holds up a sign outside of John Joseph Moakley United States Courthouse as the Tsarnaev defense nears its end of presenting case in sentencing phase of the Boston Bomber Trial on May 11, 2015 in Boston, Massachusetts. Dzhokar Tsarnaev, 21, was found guilty on all 30 counts related to his involvement in the 2013 bombing, which resulted in three deaths and over 250 injuries. (Photo by Scott Eisen/Getty Images)
BOSTON, MA - MAY 11: Sister Helen Prejean is surrounded by media after testifying at John Joseph Moakley United States Courthouse as the Tsarnaev defense nears its end of presenting case in sentencing phase of the Boston Bomber Trial on May 11, 2015 in Boston, Massachusetts. Dzhokar Tsarnaev, 21, was found guilty on all 30 counts related to his involvement in the 2013 bombing, which resulted in three deaths and over 250 injuries. (Photo by Scott Eisen/Getty Images)
BOSTON, MA - MAY 04: Members of the legal defense team for Boston Marathon bombing suspect Dzhokhar Tsarnaev, including Miriam Conrad, (from left), Judy Clarke and David Bruck arrive at John Joseph Moakley United States Courthouse as the sentencing phase in the Boston Bomber Trial continues on May 4, 2015 in Boston, Massachusetts. Dzhokar Tsarnaev, 21, was found guilty on all 30 counts related to his involvement in the 2013 bombing, which resulted in three deaths and over 250 injuries and his relatives are expected to take the stand to testify. (Photo by Scott Eisen/Getty Images)
Members of the legal defense team for Boston Marathon bombing suspect Dzhokhar Tsarnaev, including (L-R) David Bruck, Timothy G. Watkins and Judy Clarke leave John Joseph Moakley United States Courthouse as the sentencing phase In Boston Bomber Trial continues on April 27, 2015 in Boston, Massachusetts. Dzhokar Tsarnaev, 21, was found guilty on all 30 counts related to to his involvement in the 2013 bombing, which resulted in three deaths and over 250 injuries. (Photo by Scott Eisen/Getty Images)
Members of the legal defense team for Boston Marathon bombing suspect Dzhokhar Tsarnaev, including William Fick (L) and Timothy G. Watkins walk away from John Joseph Moakley United States Courthouse during the first day of the sentencing phase of the Boston Marathon Bomber Trial on April 21, 2015 in Boston, Massachusetts. Dzhokar Tsarnaev, 21, was found guilty on all 30 counts related to to his involvement in the 2013 bombing, which related in three deaths and over 250 injuries.(Photo by Scott Eisen/Getty Images)
BOSTON, MA - APRIL 21: Media and police vechicles are reflected in the entranceway of John Joseph Moakley United States Courthouse during the first day of the sentencing phase of the Boston Marathon Bomber Trial on April 21, 2015 in Boston, Massachusetts. Dzhokar Tsarnaev, 21, was found guilty on all 30 counts related to to his involvement in the 2013 bombing, which resulted in three deaths and over 250 injuries. (Photo by Scott Eisen/Getty Images)
BOSTON - APRIL 8: The jury found Dzhokhar Tsarnaev guilty at the Boston Marathon bombing trial at Moakley Federal Court. Bombing survivor Karen Brassard pauses as she answers a question outside the courthouse after the verdict. (Photo by John Tlumacki/The Boston Globe via Getty Images)
BOSTON, MA - APRIL 8: Dana Cohen, (from left), Carlos Arredondo, Karen Brassard, Liz Norden, Laurie Scher and Massport Fire Lt. Michael Ward at a press conference outside of John Joseph Moakley United States Courthouse following a verdict in the Marathon Bombing case on on April 8, 2015 in Boston, Massachusetts. Dzhokhar Tsarnaev, 21, was found guilty on all 30 counts related to his involvement in the 2013 bombing, which resulted in three deaths and over 250 injuries. (Photo by Scott Eisen/Getty Images)
BOSTON - MARCH 4: Opening statements in the trial of the Boston Marathon bomber took place at Moakley Federal Courthouse. A construction crew lowers a form to pour concrete in with the words 'Boston Strong' spray painted on it at a construction site directly across from the courthouse. (Photo by John Tlumacki/The Boston Globe via Getty Images)
BOSTON - MARCH 5: Boston Marathon bombing victim, Rebekah Gregory, right, arrived at Moakley Federal Courthouse in Boston, where the second day in the trial of Dzhokhar Tsarnaev got underway on March 5, 2015. (Photo by Wendy Maeda/The Boston Globe via Getty Images)
BOSTON, MA - MARCH 4: Joe Kebartas of South Boston protests the death penalty outside of the entrance to the John Joseph Moakley United States Courthouse during the first day of the Dzhokhar Tsarnaev trial on March 4, 2015 in Boston, Massachusetts. Dzhokhar Tsarnaev is charged with using a weapon of mass destruction in an attack on the April 15, 2013 Boston Marathon along with his brother Tamerlan, who was later killed during a shootout with police. (Photo by Scott Eisen/Getty Images)
BOSTON - MARCH 4: Jose Briceno, of Cambridge, Mass., protests outside Moakley Federal Courthouse, where opening statements began in the trial of Dzhokhar Tsarnaev on March 4, 2015. (Photo by Wendy Maeda/The Boston Globe via Getty Images)
A courtroom sketch shows Boston Marathon bombing suspect Dzhokhar Tsarnaev (R) during the jury selection process in his trial at the federal courthouse in Boston, Massachusetts January 15, 2015. Tsarnaev, who appeared in court on Thursday wearing a sport jacket and collared shirt, more formally dressed than in last week's appearances, and had trimmed his hair, is also charged with fatally shooting a university police officer three days after the bombing. He has pleaded not guilty. REUTERS/Jane Flavell Collins (UNITED STATES - Tags: CRIME LAW)
Fireworks are pictured in this undated handout evidence photo provided by the U.S. Attorney's Office in Boston, Massachusetts on March 25, 2015. The jury also saw a photo of a firework, with its powder removed, that was retrieved from a backpack found at a landfill south of Boston. FBI Special Agent Kenneth Benton testified that he and fellow agents searched the landfill after a college friend of Tsarnaev's took the plaid backpack from the defendant's dorm room and tossed it into a dumpster. REUTERS/U.S. Attorney's Office/Handout FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS
BOSTON - JANUARY 5: A heavy Coast Guard presence was seen in Boston Harbor by the Moakley Federal Courthouse for start of jury selection for the Boston Marathon bombing suspect Dzhokhar Tsarnaev trial. (Photo by David L. Ryan/The Boston Globe via Getty Images)
BOSTON, MA - JANUARY 04: A memorial stands at the site of the first bomb that went off in the Boston Marathon bombing of 2013 on January 4, 2015 in Boston, Massachusetts. Jury selection begins tomorrow in the case against Dzhokhar A. Tsarnaev, the suspected Boston Marathon bomber. Tsarnaev has plead 'not guilty' to 30 charges that could result in the death penalty if he is found guilty. (Photo by Andrew Burton/Getty Images)
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Late 2011: U.S. 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 U.S.

November 2012: Islamic Society of Boston Cultural Center in Cambridge says Tamerlan has an outburst that interrupts a sermon about it being acceptable for Muslims to celebrate American holidays.

January 2013: Islamic Society says Tamerlan has a second outburst after a sermon that includes praise for the Rev. Martin Luther King Jr.

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 still don't know who detonated them or why.

April 17, 2013: President Barack Obama signs emergency declaration for Massachusetts and orders federal aid to supplement local response.

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 by Tamerlan and Dzhokhar Tsarnaev. They steal an SUV at gunpoint from a Cambridge gas station. The driver is held for about a half-hour, then released unharmed.

April 19, 2013: Tsarnaevs have an early morning gunbattle with authorities who have tracked them to Watertown. Tamerlan, who is run over by his younger brother, dies. Dzhokhar escapes, and at around 6 a.m., authorities tell residents of Boston and surrounding communities to stay indoors. All mass transit is shut down. That order is lifted around 6:30 p.m., 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 weeklong search for a cemetery willing to take the body.

May 22, 2013: An FBI agent in Orlando, Florida, fatally shoots Ibragim Todashev, a friend of Tamerlan's, after he lunges at law enforcement officials questioning him about the Waltham killings. Officials say that before he died, he had agreed to give a statement about his involvement.

July 10, 2013: Dzhokhar Tsarnaev pleads not guilty to 30 federal charges.

July 23, 2013: Marc Fucarile is the last survivor of the bombings to leave the hospital.

Jan. 30, 2014: Prosecutors announce they will seek the death penalty against Dzhokhar.

April 15, 2014: Ceremonies and events 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.

May 30, 2014: Khairullozhon Matanov, 23, of Quincy, is arrested on charges of obstructing the investigation by deleting information from his computer and lying to investigators.

June 18, 2014: Tsarnaev's lawyers file first of several requests to move the trial to Washington, D.C.

July 21, 2014: Azamat Tazhayakov, a college friend of Dzhokhar's, is convicted of obstruction of justice and conspiracy for agreeing with another friend to get rid of a backpack and disabled fireworks they took from his dorm room three days after the attack.

July 22, 2014: Stephen Silva, believed to have provided the gun used by the Tsarnaevs to kill Collier, is arrested on drug and weapons charges.

Aug. 22, 2014: Dias Kadyrbayev, 20, pleads guilty to impeding the investigation by removing incriminating evidence from Dzhokhar's dorm room.

Sept. 24, 2014: Judge grants delay and pushes start of trial to Jan. 5, 2015.

Oct. 28, 2014: Robel Phillipos, 21, of Cambridge, is convicted of lying to federal agents about being in Dzhokhar's room.

Nov. 25, 2014: Federal judge rejects a request from lawyers for Tsarnaev to order prosecutors to turn over evidence about his older brother's possible participation in the Waltham slayings.

Dec. 18, 2014: Tsarnaev appears in court for first time since his July 2013 arraignment.

Jan. 5, 2015: Jury selection begins in Tsarnaev's trial.

March 4, 2015: Tsarnaev's lead defense attorney, Judy Clarke, declares in opening statements: "It was him."

April 6, 2015: Prosecutors and defense present closing statements.

April 7, 2015: Jury begins deliberating verdicts.

April 8, 2015: Jury convicts Tsarnaev; will weigh possible death sentence in forthcoming penalty phase of trial.

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