The intelligence community is poring through all threat reporting for any clues , U.S. counterterrorism officials told CNN . 8-year - old bombing victim Martin Richard reportedly attended service with his family . Richard 's father was a spectator , a family spokesman tells reporters . His mother and sister were seriously injured and died , conflicting reports . Candlelight vigil on Tuesday ; boy 's father thanks God .
8-year - old bombing victim Martin Richard reportedly attended service with his family . Richard 's father was a spectator , a family spokesman tells reporters . His mother and sister were seriously injured and died , conflicting reports . Candlelight vigil on Tuesday ; boy 's father thanks God .