Photo Gallery: Boston manhunt: Friday, April 19, 2013 16/60

Massachusetts Gov. Deval Patrick, address members of the media near a the search area for a suspect in the Boston Marathon bombings, Friday, April 19, 2013, in Watertown, Mass.  The two suspects in the Boston Marathon bombing killed an MIT police officer and hurled explosives at police in a car chase and gun battle overnight that left one of them dead and his brother on the loose, authorities said Friday.  (AP Photo/Matt Rourke) ORG XMIT: MAMR138