A Look at Helicopters Used in Search.
BALDWIN: Helicopters scouring the woods and farmland using heat-seeking technology in the search for these two escaped murders. I want to go live to the helicopter pilot who is walking us through this same technology that they've used in this search in Upstate New York. I have Sergeant Darry Williams with me, with the DeKalb County Police Aerial Support Division. Sergeant, thank you so much. I also have Lenny DePaul, back with me on set, former commander of the U.S. Marshal Service Regional Fugitive Task Force for New York and New Jersey. To the chopper, we go. Sergeant Williams, this is an acronym being used. Hello. This is FLIR technology, infrared technology. It works in the daytime as well. Explain this to me.</s>SGT. DARRY WILLIAMS, DEKALB COUNTY POLICE AERIAL SUPPORT DIVISION: OK. The infrared camera, which picks up infrared energy, which is heat, that heat is converted to an electronic signal which is then converted into a thermal image which is then displayed on a monitor inside the aircraft.</s>BALDWIN: So what you're able to detect is anything with a heat source. So whether it's a human running around the woods below you or a bear, you would pick it up on this screen we're looking at on the right side of the TV. How do you differentiate between a human being and wildlife?</s>WILLIAMS: The image that you view is going to be the outline of whatever image you're being looking at. If it's a body, it's going to be the outline of a body. If it's bear, it identifies the bear. If it's a bird or dog, it will identify it just by the images produced on the screen.</s>BALDWIN: Obviously, it's getting cooler at night. Would that be when you would maximize this kind of technology or does that not Matter at all?</s>WILLIAMS: Yes. The nighttime amber temperature is greatly reduced, which enables the camera system to work more effectively. Everything cools down, the body is going to stay at a temperature about 96 degrees and everything else around it is going to cool off. Nighttime is very effective.</s>BALDWIN: And, Sergeant, stand by. I want to bring Lenny in. One thing I wanted to ask you earlier -- and you used to command. This was your task force and I know you wanted to give them props for all that they have been doing.</s>LENNY DEPAUL, FORMER COMMANDER, U.S. MARSHAL SERVICE REGIONAL FUGITIVE TASK FORCE FOR NEW YORK AND NEW JERSEY: Absolutely. I want to tip my hat to my successor and his men and women who have been out there working around the clock.</s>BALDWIN: Is it in these two -- it sounds silly to say. Is it in these two killers' best interests to stay together or separate?</s>DEPAUL: I'm thinking they are together. They need each other. They fed off each other, they put this whole thing together and they are feeding off each other. They are picking each other's brains. They are almost day seven into this thing so they are probably on each other's nerves if it is them contained in this perimeter. I'm sure they are miserable. I'm not sure -- again, I'm assuming they are together.</s>BALDWIN: Right.</s>DEPAUL: Apparently, the investigation is leaning in that direction.</s>BALDWIN: Sergeant Williams, let's say that you are looking at these screens and you pick up on something from the skies. What is your next step? You have guys on the ground ready to roll?</s>WILLIAMS: Yeah. We will communicate with our police department guys on the ground via radio and give them play-by-play of what we are seeing which aids in apprehensions.</s>BALDWIN: We were looking at a live picture a second ago and it's a pretty nasty, rainy day. Does that Matter, the weather?</s>WILLIAMS: Actually, the rain helps to kind of cool things down. So on a rainy day like today, our camera is more efficient.</s>BALDWIN: What could a suspect do if they are smart? I don't know how many escaped fugitives are smart. But what could one do to evade detection from your thermal imaging infrared systems?</s>WILLIAMS: By hiding beneath an object. We can't see through objects. We can only see around them. So hiding under an item would aid in not being detected.</s>BALDWIN: OK. I know we'll have a live demo with you in DeKalb County at the next hour. Look forward to that to see how this works. Thank you so much, Sergeant Darry Williams. Lenny, you know how this works, you say they are shrinking the perimeter. How do they even know how to establish that perimeter?</s>DEPAUL: They are going off what the K-9s are detecting and establishing the perimeter that way. It's a large perimeter. I believe it's almost five miles. Shrinking it or moving in on these guys, you know, somebody possibly saw them, there's radio communication, aviation may have picked up on something and they may need to shrink it up. That's a good sign. Let's keep our fingers off and hopefully this thing goes down without incident.</s>BALDWIN: You keep checking your phone.</s>DEPAUL: I do.</s>BALDWIN: You keep hoping they'll have news, they will be caught.</s>DEPAUL: Yeah.</s>BALDWIN: We all hope they'll be caught. Lenny, thank you very much.</s>DEPAUL: Thank you.</s>BALDWIN: Next, more on our breaking news. Investigators looking at whether the female worker's husband may have been involved. Did he know about the plot? We'll take you there live in Upstate New York, next.