There have been many developments in the Boston Marathon bombing overnight. Twenty four hours ago, investigators didn’t know very much about who was responsible for Monday’s attack.
Here’s how last night’s events played out.
Late Thursday afternoon the FBI released photographs and video of two suspects and appealed to the public’s help identifying them. Around 10 p.m. shots were fired on the Massachusetts Institute of Technology campus in Cambridge. At 10:30, an MIT campus police officer, who was later pronounced dead, was found with multiple shot wounds in his vehicle.