How does a kid from Cambridge who went to good schools and had friends and teachers who loved him go on to co-stage the Boston Marathon bombings?

That's the biggest takeaway from the trial of Dzhokhar Tsarnaev, which concluded last week with a death penalty verdict. Now that the trial is over, reporter Adam Reilly sat down once again with WBZ's Jim Armstrong and Boston.com's Hilary Sargent to talk about their lasting impressions of the case, the defendant, and all the questions that remain unanswered.

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