The Justice Department intends to seek the death penalty against Dzhokhar Tsarnaev, who faces 30 charges over the Boston Marathon bombings April 15.
Tsarnaev, 20, awaits a trial on charges that he and his brother, Tamerlan, carried out the bombings that killed three people and injured more than 250 more. He is also charged with killing an MIT campus police officer.
Tamerlan died in a police shootout April 19 at age 26.
NBC News has more on the developments here.