Video security clips from a Lord & Taylor department store across the street from where the second bomb exploded show a man acting suspicious, FBI personnel said. The images in the video shows him reacting to the first explosion by quickly exiting the site, just as the second detonation is about to occur, the Christian Science Monitor reported. "How crucial this is in the case, we don't know yet, it does seem, though, at least a sign of some progress," NBC's Michael Isikoff said.
The person in question is a young white man and as tall as 6 foot 2. Sources who have seen the tape he appeared to be alone, wearing a black jacket, gray hoodie and white baseball cap backwards on his head, CBS News correspondent Bob Orr reported. Sources told CBS that the man appeared to place his backpack on the ground, then after the first explosion, he fled, and moments later the second blast occurred near the spot where he had been standing, news reports said. How
"They're trying to find that individual and they'll ... appeal to the public, 'Can you put a name to the face,'" FBI assistant director John Miller said. "They will also likely introduce a couple of other faces, people in that area that they're interested in. It's unlikely that they'll refer to them as suspects. They'll say these are people we're seeking because they were in the area and we believe they can provide information."
The bombs were crudely designed by ordinary kitchen pressure cookers pack with explosive, nails and ball bearings, investigators and others close to the case said.
Investigators also suspect the devices were hidden inside black duffel bags, and then left on the ground.
14 bombing victims, including three children remain in critical condition following the bomb blats.
The blasts killed 8-year-old Martin Richard, of Boston, 29-year-old Krystle Campbell, of Medford, and Lu Lingzi, a Boston University graduate student from China.
Since Monday, dozens of victims were released from hospitals throughout the Boston ara. Officials at three medical cener that treated some of the most seriously injured said they expect their remaining patients to survive, including a 2-year-old boy with a head injury.
