Boston Bomber Dzhokhar Tsarnaev Sentenced to Death

Tsarnaev was convicted by the same jury of seven women and five men last month of all 30 counts related to the deadly April 15, 2013, bombing.
4:37 | 05/15/15

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Transcript for Boston Bomber Dzhokhar Tsarnaev Sentenced to Death
This is an ABC news special report. Verdict in the Boston Marathon bombing truck now reported George Stephanopoulos. And we are coming on the air because the jury deciding the fate of Boston Marathon bombers are hard earned I've has reached a verdict if sentenced him to death. Seven men and five and reached his decision after about fourteen hours deliberations and after findings and I've guilty of all thirty charges against him. That was in the first phase of the trial last month seventeen of those charges could of resulted in the death penalty. All for the crimes of April 15 2013. When certain items bombs in the terror that followed resulted in the deaths of four people. Injuries to more than 260. Others. If she's Tanya Imus has been in the core of the start of this trial he's with us from Boston now and Tom what's your analysis of when this verdict a cold. Well George really I think from day one that day that forced victim walked into the courtroom on a prosthetic or maybe even it was when Mort Richard's father took the stand. And described how was eight year old son. Had been killed by despondent was such an emotional time in court. Day after eight weeks after weeks and there were several points when there were witnesses on the stand crying there were jurors crying and there were even the public that was watching this trial unfold inside that courtroom cried incredibly emotional this is a huge win for the prosecution. From the get go they wanted the death penalty and they haven't we should mention act 41 years old to harsh our night is now the youngest person. On federal death row. Now they were able to prove this because they said Joseph Hart not only. Went out there and bomb the Boston Marathon as a political act as an act of terrorism. But intentionally wanted to her children they were able to do this by showing that haunting photo of the hearts our ninth at the Boston Marathon two years ago. Four feet behind the role of children they sit he could clearly see they were kids there there were kids that we're going to be killed and then after they showed that famous big you'll twenty minutes later. Buying milk at whole foods with that big you they were able to start the argument that he was not remorseful heating care about would get done. And in three and three months later I should say. That being a snapshot of Joseph hearts our night inside his courtroom holding cell he looks at a surveillance camera and he did that surveillance camera the middle finger. Prosecutors are closing arguments in this space said there is not a sign of remorse on his face now this is somewhat of a controversial decision because I mentioned the Richard and we earlier. They had come out in a Boston op Ed in they had said. They actually wanted life in prison the reason why they wanted that is because if you got life in prison he would goal weight he would leave their lives there was no chance for parole or appeals they would never have to see him again. Now with this base now that he's and get the death sentence there were afraid there may be appeals date they may still hear from him. And he may never be put to death or it may take several years we we should mention that since the late 1980s when they first re instituted. The federal death penalty 74 people. Have been on death row but only three had been put to death one of those of course Oklahoma City bomber Timothy McVeigh. That being said there were other victims like Liz nordic what's been in the courtroom since Dave when she was in the courtroom today. Along with Carlos Arredondo the cowboy who was made so famous and that papers heroic acts along with the Richard family report as well. But lives in order told me each person's lost a leg in the Boston Marathon bombing it was. Joseph Hart bomb that that injured them and she wanted him to die there were several other victims also that one of the death penalty they wanted justice and and to date. We will talk them later but I I think in their minds this is justice for them George. Okay timing on this thanks very much owner appeared Thomas or Chief Justice correspondent as long time and NPR we just heard Tom mention the possibility of appeals. What is that appeals process look like Persian arsenide. Well he has ten days to file a notice of appeal with the First Circuit Court of Appeals. In Boston then the process will start to unfold we don't know how long it will take and George I would just add the federal government sought this death penalty. Primarily for two reasons the heinous nature of the crime and the fact that there was so much premeditation. While we're hooked officials said that they wanted to show the public that they take this could took this case seriously and it the most severe punishment was warranted in this case. Okay Pierre Thomas thanks very much once again the verdict is in the death penalty for jars earn I have. And six of seventeen counts he showed no emotion at all knows no response to that verdict came in of course is pier just said. He will now face the appeal process we'll have much more tonight Ramon is David Muir Newton at the latest anytime an abcnews.com. I'm George Stephanopoulos in New York have a good day. This has been a special report. From ABC news.

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

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