New video in Brown University shooting

Anna Schecter has more on the investigation. How helpful is this new video? And how is it that police zeroed in and said, this is our person of interest? Well, it's helpful in that you do see the person's gait. So someone who knows this person well, a parent or a sibling, could recognize that gait, potentially. But it's not a lot to go on. We don't have any visuals of the face, any details on the clothing. It's just all black clothing on both of the two videos that have been released. Now, how did they hone in and say, OK, that's the person? Well, police would have already interviewed the students who were in the room when the shooting took place. So they would have given that description of the dark clothing, that sort of thing. And maybe they have more video that they're not putting out. They seem to be going very slowly on that front. In this stage of a normal investigation, you would think that police would start to push out more to the public. And if you see-- if you have seen this person, if you see something, say something-- that really works. And that helps in a lot of these types of cases. Yeah. You and I are on a set here with big monitors. And it's hard, almost, to even see when this person walks into frame because the background is dark. They're wearing dark clothing-- not a ton of identifiable features, as you were mentioning, except maybe the gait, how they're walking. Yeah. Shouldn't there be more video at this point? I mean, I know you said law enforcement may have more that they're holding on to. But shouldn't there be a wealth of resources from a university campus? The most important evidence that they can gather is video of the individual walking into the building and exiting and matching that with other surveillance video of this individual walking down a hallway, matching that with eyewitness testimony. So the fact that we don't seem to have any video from on campus that's clear-- the way technology has evolved, we have HD cameras in so many places. So it is surprising that we don't have that, particularly on a college campus. You would think that for security purposes, outside of every single campus building, dorm room, you would have a camera so that security can monitor who is entering and leaving. And there are lots of reasons why you would want that on a college campus. So-- unusual that we're not seeing a lot. What else do you think law enforcement-- what do you think they're asking? What do you think they're looking for? What do you think they're doing behind the scenes? Well, because they took so much time on the person of interest that they now truly believe was not involved at all, they are going back and likely re-interviewing all of those potential eyewitnesses. They might have to do that at the hospital. Remember, we have wounded people here who are still recovering. But those people, anyone who was there who saw something-- those are key. They're also going to try to go back. Did they miss any imagery? Then DNA evidence-- can they go through in that building in the exact space shooting was carried out? Did the shooter touch anything? We don't know if they were wearing gloves. And it looks in that video they might have even been wearing a pair of black gloves. So that indicates to me there was quite a bit of thought that went into this. And it paid off for this shooter because now we are two days later with seemingly very little trace.

Anna Schecter, thank you.