Boston bomber penalty phase death penalty or life in prison no parole?

Now that the penalty phase has begun, the big question is whether or not to give him the death penalty. 17 of the 30 charges he was convicted of carry a possible death sentence. Is this guy worth the money to put on death row or could he spend the rest of his life in prison at a much lesser cost?

My opinion I feel he deserves the death penalty for what he did. I feel for the family, the police officers and everybody who was involved. it was a tragic day and he should be held responsible for his actions. I don't believe in taking care of people like this, but the appeals process and the way the system works in the United States he may sit on death row for 30 years just wondering everybody else's thoughts.

http://www.latimes.com/nation/la-na-boston-tsarnaev-penalty-phase-20150419-story.html#page=1