left, they sent it to the state police lab. they got a dna hit, at least one of the escapees in that home yesterday. and then this morning, in a field somewhere nearby they found more physical evidence. they won't tell us exactly what. but this led them to really close in on an area where they believe the two were and they always believed they're together. they have no evidence that they split up. close in on this area that led to that 3:45 encounter that ended with a man they believe to be richard matt dead. steve? >> john what do you know about this reports here of a second round of gunfire? so two different episodes of gunfire? maybe what do we know about this second round? >> essentially all we know is that law enforcement officials are telling us they're -- that a second round has been heard. we don't know what it is. we are saying that it is part of their continuing search for david sweat. they believe he's there.