From The Boston Globe:

In Dzhokhar Tsarnaev’s trial, the prosecution and defense both agreed on “the who, what, where, and when,” defense attorney Judy Clarke said in closing statements. “We very much disagreed on the why.” The “why” was the focus of arguments during closing statements. For the government, Aloke Chakravarty spoke for just over an hour, showing a level of emotion not previously seen from prosecutors in the case. Clarke’s defense, accepting responsibility but casting Tsarnaev’s older brother Tamerlan as the driving force of the crimes, lasted about an hour and a half.