The Daily Item, Sunbury, PA

News

April 20, 2013

How the Boston bombing investigation unfolded

By David Montgomery, Sari Horwitz and Marc Fisher

The Washington Pos

BOSTON — Within hours of the Boston Marathon bombing, investigators were already overwhelmed. Bloody clothing, bags, shoes and other evidence from victims and witnesses was piling up. Videos and still images, thousands of them, were pouring in by e-mail and Twitter.

Quickly, the authorities secured a warehouse in Boston's Seaport district and immediately filled the sprawling space: On half of the vast floor, hundreds of pieces of bloody clothes were laid out to dry so they could be examined for forensic clues or flown to FBI labs at Quantico, Va. for testing. In the other half of the room, more than a dozen investigators pored through hundreds of hours of video, "looking for people doing things that are different from what everybody else is doing," Boston Police Commissioner Edward Davis said in an interview Saturday.

The work was painstaking and mind-numbing: One agent watched the same segment of video 400 times. The goal was to construct a timeline of images, following possible suspects as they moved along the sidewalks, building a narrative out of a random jumble of pictures from thousands of different phones and cameras.

It took a couple of days, but analysts began to focus on two men in baseball caps who had brought heavy black bags into the crowd near the marathon's finish line but left without those bags. The decisive moment came on Wednesday afternoon, when Massachusetts Gov. Deval Patrick got a call from state police: The investigation had narrowed in on the man who would soon be known as Suspect No. 2, the man whom police captured Friday night bleeding and disoriented on a 22-foot boat in a Watertown driveway.

Patrick said the images of Suspect No. 2 reacting to the first explosion provided "highly incriminating" evidence, "a lot more than the public knows."

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