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Everything You Should Know About the Boston Marathon Bombing Trial

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Updated: | Originally published: ;

The trial of one of the accused Boston Marathon bombers started Monday, nearly two years after the attack that killed three people and injured more than 260 others, with the beginning of the selection of the jury that will ultimately decide the fate of Dzhokhar Tsarnaev. Here’s what to know as the trial gets underway.

What happened in April 2013?

Tsarnaev and his older brother, Tamerlan Tsarnaev, are suspected of building and detonating pressure-cooker bombs near the finish line of the marathon on April 15, 2013. The brothers escaped initial capture but were later identified as suspects and confronted in a days-long manhunt that shut down much of the Boston area and transfixed the country. Tamerlan died after a shootout with authorities that followed the death of a Massachusetts Institute of Technology police officer; he was also said to have been run over by a vehicle driven by his brother, Dzhokhar, who was later found in a boat parked on a driveway in nearby Watertown.

Photos: The Last Moments of the Man Hunt for Boston Bombing Suspect

Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
6:02.14 p.m. Tactical Police Officers converge on the house where 19-year-old Boston Marathon bombing suspect Dzhokhar Tsarnaev was hiding at the time of his capture in Watertown, Mass., April 19, 2013.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
6:04.55 p.m. Tactical Police Officers get their first view of the boat where Tsarnaev was hiding.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
6:15.04 p.m. Massachusetts State Police troopers prepare for the final assault on the boat where Tsarnaev was hiding.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:08:59 p.m. The boat containing Tsarnaev.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:29:21 p.m. Tsarnaev, bloody and disheveled, rises out of the boat.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:29:38 p.m. Tsarnaev raises his hands.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:31:10 p.m. Tsarnaev stands in the boat.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:31:11 p.m. Tsarnaev stands in the boat.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:31:23 p.m. Tsarnaev stands in the boat with the red dot of a rifle's laser sight locked on his head.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:32:10 p.m. Tsarnaev raises his shirt to show that he is not armed or concealing an explosive device.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:33:54 p.m. Tsarnaev begins to step out of the boat.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:39:48 p.m. Tsarnaev stands in the boat with his hands raised.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:39:48 p.m.Tsarnaev stands in the boat with his hands raised.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:39:59 p.m. Tactical units move in on Tsarnaev to remove him from the boat.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:40:06 p.m. Tactical units move in on Tsarnaev to remove him from the boat.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:40:16 p.m. Tactical units move in on Tsarnaev to remove him from the boat.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:40:31 p.m. Tactical units remove Tsarnaev from the boat and place him in custody.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:46:48 p.m. Tactical units tend to Tsarnaev.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:46:48 p.m. Tactical units tend to Tsarnaev.Sgt. Sean Murphy—Massachusetts State Police
Boston Marathon bombing suspect Dzhokhar Tsarnaev's capture
7:49:02 p.m. Medical personnel move Tsarnaev into an ambulance.Sgt. Sean Murphy—Massachusetts State Police

What about the brothers’ background?

Tamerlan and Dzhokhar came to the U.S. from Kyrgyzstan when they were aged 15 and 8, respectively. The older brother became a solid boxer while in Cambridge, Mass., and his younger sibling would become a popular wrestler at Cambridge Rindge and Latin High School before enrolling at the University of Massachusetts at Dartmouth. Dzhokhar was said to have adjusted to life in the U.S. easier than Tamerlan, who authorities painted as having become disillusioned and who they said would later align with radical Islam.

MORE The Horror. The Heroism.

What charges does Tsarnaev face?

He faces 30 federal counts including the bombing of a public place, malicious destruction of public property, carjacking, disruption of commerce and possession and use of a weapon of mass destruction resulting in death. Here’s the full list.

How long is the trial expected to last?

That’s unclear, but it could be several months. Selecting a fit jury from a pool of more than 1,200 could take a few weeks, according to the Boston Globe, and the trial will be split into two phases. The first will involve determining his innocence or guilt; if the jury finds Tsarnaev guilty, the second phase will revolve around his sentencing.

Where will the trial take place?

The trial is set to be held at the U.S. Court of Appeals for the First Circuit in Boston. Tsarnaev’s defense team repeatedly tried to have it moved, arguing it would be too difficult to find an impartial jury where the attack took place. But the district court wouldn’t budge, writing in a newly released decision that it would be capable of finding 12 jurors and six alternates in the “large and diverse” population that resides in the district’s Eastern Division.

Who are the lawyers on both sides?

Legendary defense attorney Judy Clarke quickly joined Tsarnaev’s defense team, bringing her experience of representing the likes of unabomber Ted Kaczynski and Jared Lee Loughner, whose 2011 shooting rampage in Arizona left six people dead and 13 injured, including former Congresswoman Gabrielle Giffords. Many of her clients are convicted and imprisoned while having avoided capital punishment, which Clarke opposes. Two other members of Tsarnaev’s defense team are Miriam Conrad, the chief public defender for Massachusetts, New Hampshire and Rhode Island, and David Bruck, a Washington and Lee University School of Law professor and the director of its death penalty defense clinic.

The prosecution is largely composed of Assistant U.S. Attorneys with strong background in terrorism cases. William Weinreb and Aloke Chakravarty both played key roles in the handling of the arrest of failed Times Square bomber Faisal Shahzad in 2010. Nadine Pellegrini formerly led Boston’s major crimes unit.

Both legal teams will be presided over by U.S. District Judge George O’Toole Jr.

Who will likely be called as witnesses?

The court was recently handed a list of 590 law enforcement personnel, 142 civilians and 1,238 exhibits that they might make use of during the trial, the Times reports. That group includes some of the officers who were involved in the response to the attack, in addition Tsarnaev’s arrest and questioning.

Does Tsarnaev face the death penalty?

Yes. Even though the crime was committed in Massachusetts, where capital punishment has been illegal since the early 1980s, prosecutors charged Tsarnaev in the federal court system, which allows it. (A poll by the Globe in July found that 62% of respondents supported the decision by Attorney General Eric Holder to seek the death penalty, but 29% opposed his choice.)

What is the defense expected to argue?

Legal observers agree that the defense attorneys will try to protect their client from the death penalty rather than prove his innocence. Among the issues at play will be how Tsarnaev may have been influenced by his older brother, which would involve cooperation from close friends and family. The defense team had previously said it had difficulties researching his relatives overseas.

How do people in Massachusetts feel about the trial?

Interviews with local residents and survivors, conducted by the Boston Globe and New York Times, suggest they are ready to bring the tragic saga to a close. How exactly they hope to do that varies, as some say they don’t want to rehash the attack while others are eager to learn more about what happened.

Why has the case taken so long to come to trial?

The trial was originally scheduled to begin last fall but the defense team asked for it to be pushed back to September 2015 or later, claiming it didn’t provide enough time to prepare due to an overwhelming amount of material from prosecutors. The new date then became Jan. 5.

Tragedy in Boston: One Photographer’s Eyewitness Account

Explosions At 117th Boston Marathon
April 15, 2013. Boston police officers react to a second explosion near the finish line of the 117th Boston Marathon.John Tlumacki—The Boston Globe/Getty Images
Explosions At 117th Boston Marathon
April 15, 2013. Bystanders aid victims on the sidewalk after an explosion near the finish line.John Tlumacki—The Boston Globe/Getty Images
Explosions At 117th Boston Marathon
April 15, 2013. Victims lie on the sidewalk near a barrier at the scene of the first explosion.John Tlumacki—The Boston Globe/Getty Images
Explosions At 117th Boston Marathon
April 15, 2013. A man comforts a victim on the sidewalk at the scene of the explosion.John Tlumacki—The Boston Globe/Getty Images
Explosions At 117th Boston Marathon
April 15, 2013. Bystanders help a wounded woman at the scene of the first explosion on Boylston Street near the finish line.John Tlumacki—The Boston Globe/Getty Images
Explosions At 117th Boston Marathon
April 15, 2013. A wounded man is helped on the sidewalk at the scene of the first explosion.John Tlumacki—The Boston Globe/Getty Images
Explosions At 117th Boston Marathon
April 15, 2013. A wounded boy is evacuated from the scene by a Boston police officer.John Tlumacki—The Boston Globe/Getty Images
Explosions At 117th Boston Marathon
April 15, 2013. A victim from the explosion is wheeled away from the scene by emergency personnel.John Tlumacki—The Boston Globe/Getty Images
Explosions At 117th Boston Marathon
April 15, 2013. A woman prays at the scene of the explosion.John Tlumacki—The Boston Globe/Getty Images

Read next: Summary of Counts Facing Boston Marathon Bombing Suspect

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Write to Justin Worland at justin.worland@time.com