we're talking about. this is the site of the sex e second explosion. >> the mailbox here and right back it was placed near the mailbox. >> you can see the scarring, some sort of explosion caused the dark scarring on the surface. this photo is of the very site of where i'm told the lord & taylor video if my memory of boston is right, they had what they believed to be a very good static view of this and enhancement of that video from the department store. and i'm told from boston tv station video then used to go back through and make further refinements in the analysis. from that i was told they had a breakthrough in identification of a suspect. i want to be very careful about this because people get very sensitive when you say these things. i was told by one of these sources who is a law enforcement official that this was a dark-skinned male. the official used some other words i'm not going to repeat them. because of the sensitivity people will take offense even at saying that. i'm just saying this was relayed to me by a reputable law