http://www.slate.com/articles/news_and_politics/dispatches/2015/05/dzhokhar_tsarnaev_sentencing_will_a_boston_jury_spare_his_life.html

 “This is by no means a mathematical or mechanical process,” said Judge George O’Toole as he instructed the jury a few moments before they heard closing statements in United States v. Dzhokhar Tsarnaev. Yet O’Toole had just presented the jurors a verdict form, the pages of which ask them—once their deliberations begin—to tally up their votes on a list of pros and cons guiding their decision to kill Tsarnaev or spare his life.