Dzhokhar A. Tsarnaev
One Boston Marathon suspect believed dead, another subject of massive manhunt
At least one police officer was killed, another is in serious condition as law enforcement found the two men believed to be behind the Boston Marathon terrorist attacks. The first man, Tamerlan Tsarnaev, is believed to be dead, but Dzhokhar Tsarnaev is at large and the subject of a massive manhunt.