The hunt for a suspect in the tragic Boston Marathon bombings remains an arduous task for the FBI.
While sifting through hours of footage from Monday's (Apr. 15) events, investigators spotted a man seen dropping off a bag, and then walking away from the site of the second of two deadly explosions.
According to the AP, the footage has not been made public but may shed some light on the cause of the attacks that injured 170 people and left three, including an 8-year-old boy, dead.
Massachusetts Gov. Deval Patrick said it would be no easy feat to nab the person responsible but that thorough detective work will aid the process.
"It's going to happen by doing the careful work that must be done in a thorough investigation," Patrick said. "That means going through the couple of blocks at the blast scene square inch by square inch and picking up pieces of evidence and following those trails, and that's going to take some time."
Reports scoured the 'net yesterday that authorities had taken a suspect into custody but were later retracted. Evidence has shown that the bombs were crafted from kitchen pressure cookers packed with explosives, nails and ball bearings.
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