Massachusetts State Police officers are going door to door in the search for one of the suspects involved in the Boston Marathon bombing. 

Reporter John Carpilio says police have set up a perimeter.

[audio:http://wbsm.com/files/2013/04/BOSCarp1.mp3|titles=BOSCarp1

Boston Police Commissioner Ed Davis confirms the other suspect is dead.  The "white hat" suspect in photos released yesterday by the FBI is the one on the loose.  At least three people were killed on Monday and over 170 wounded in the blasts.