article_snippet.sent: Dzhokhar Tsarnaev, the 21-year-old accused Boston Marathon bomber, faces life in prison or the death penalty.
article_snippet.sent: Tsarnaev is accused of 30 counts, including setting off weapons of mass destruction at a public event as an act of terrorism.
article_snippet.sent: Seventeen of 30 counts, including setting off weapons of mass destruction at a public event as an act of terrorism carry a sentence of death or life imprisonment.
article_snippet.sent: If Tsarnaev is found guilty of at least one of the 17 capital counts, the trial will proceed to a second phase, the so-called penalty phase.
article_snippet.sent: That part of the trial will include evidence of aggravating and mitigating factors, and the jury will be asked to weigh elements that make this crime especially heinous against details from Tsarnaev's background and mental health history that would weigh in his favor.
highlights_snippet.sent: If Dzhokhar Tsarnaev is found guilty of at least one capital count, trial will go to penalty phase .