12:00 PM Jan 31, 2014
In this image taken from Massachusetts State Police Air Wing during the manhunt in Watertown, Massachussetts, Friday, April 19, 2013, police could detect the suspect's body of Dzhokhar Tsarnaev, seen in this night vision image of the boat in a resident's backyard. (Massachusetts State Police/Zuma Press/MCT)
WASHINGTON (MCT) – Federal prosecutors will seek the death penalty for Dzhokhar Tsarnaev in last year's Boston Marathon bombing, saying in court papers that the deadly plot was committed in an "especially heinous, cruel and depraved manner."