Boston bomber is caught on camera

The FBI said there has been 'substantial progress' in the Boston bombing investigation after they analyzed surveillance footage from a nearby department store which showed a 'man in a hooded sweatshirt in a backwards baseball cap' planting the second bomb.

Because of that video - and local news footage - authorities were able to get exactly what they have been looking for - an individual coming in and dropping a package in a black bag before quickly walking away again. 

It was initially believed the man had been arrested and would soon be taken to court but White House officials later denied that anyone had been take into custody or even positively identified.

CNN - who broke the arrest news - later backtracked and said it had been a misunderstanding and no arrest had been made.

Is this the man? While everyone seems to instinctively cower - the man dressed in black and highlighted - appears to run away at speed from the scene in the opposite direction to everyone else who was caught up in the blast 

 Second Bomb: Photos show a bag next to a mailbox along the marathon route and may have been the footage used by the FBI to          positively ID a suspect