BOSTON — Dzhokhar Tsarnaev, a failed college student, sat stone-faced in a federal court here on Friday as a jury sentenced him , to death for setting off bombs at the 2013 Boston Marathon that killed three people and injured hundreds more in the worst terrorist attack on American soil since Sept. 11, 2001.
The jury of seven women and five men, which last month convicted Mr. Tsarnaev, 21, of all 30 charges against him, 17 of which carry the death penalty, took more than 14 hours to reach its decision.
