Jury Selection for Accused Marathon Bomber Begins in Boston

Dzhokhar Tsarnaev's father tells ABC News Americans want to "harm" his son.
2:14 | 01/05/15

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Transcript for Jury Selection for Accused Marathon Bomber Begins in Boston
Rob, thank you. Now, to Boston tonight, and to the trial of accused Boston bomber dzhokhar tsarnaev. You'll remember the country watching for days, authorities zeroing in, the suspect hiding in that boat. Later, bloody as police moved in to arrest him. Tonight, his father saying he believes, quote, the Americans are going to harm his second son just as they did to his oldest son. While families of the victims in Boston have their own message tonight. ABC's Brian Ross. Reporter: Potential jurors were told today they must forget images like this one. And this one, allegedly showing dzhokhar tsarnaev as he placed one of the bombs in a backpack near the marathon finish line. Nearby, 8-year-old martin Richard, killed in the blast. And here, two brothers, J.P. And Paul Norden, each of whom lost a leg in the blast. He knew when he dropped that backpack there was kids, women, families. Reporter: The mother of the two brothers, Liz Norden, plans to be at the trial every day. I think he is an animal. He deserves the death penalty. Reporter: Security was heavy in court today. The bearded 21-year-old tsarnaev, dressed casually as if he were still a college student, watched as judge George o'toole addressed the first of some 1,200 jurors. The judge told them they have to be prepared to be fair and impartial, but also be able to impose the death penalty if they find the accused bomber guilty. Defense lawyers are expected to argue that tsarnaev, who was captured while hiding in this boat. He is moving. We have movement in the boat. Reporter: Only did what he did under the influence of his older brother, who died in a police shootout. But the jury will also see this bullet-pocked anti-american message that satsarnaev allegedly scrawled on the side of the boat, saying "The government is killing our innocent civilians." And defend him online, saying, there is no proof he planted any of the deadly bombs. The judge here in court today said it could take most of the month to pick a jury of 12 people. In a trial that's expected to be long, and for many in this city, very painful. David? Brian, thank you. You a in development this evening outside Ferguson,

This transcript has been automatically generated and may not be 100% accurate.

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