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Laundrie. the sooner you can get dogs on scene the more successful they will be, and it's good for everyone. >> tell me how it works. how does it begin with the use of the dogs? i understand in blood hounds they can hold on a scent for something like 14 days. what is it you would expose dolby or another dog to to search for somebody like lawn. >> fbi went into brian laundrie's house to grab personal items. from a dog handler's points of view that's a scent article. what is scent. here's what the dogs are looking for. think of your body as a big sack of skin. about every second thousands of ski...

To be in warm, dark protected places. so a scent can stick around for a long time. that's why we get sick because we have bugs and bacteria up in our nose. so the swamp area where maybe he is, that scent might stick around for a while because it's protected by vegetation. can blow into some coverage. . if he was in there within the past couple of days to a week, that scent might still be lingering around. the other thing i wanted to say is that they need to use scent discriminating dogs. when they collected that scent article from brian's house where nobody else has touched it, it might be lik...

Training blood hounds. jim cavanaugh is still with me and so is clint van zandt. let's talk about the role of the blood hounds here. again, as clint pointed out, in a couple of hours they are going to lose daylight there in fox lake. what happens then? can the blood hounds still be used effectively if there is no sunlight? >> oh absolutely. blood hounds can trail anywhere from four hours to a couple of days depending on the environment. i don't think that is going to be the hindrance with that. the biggest problem they will probably have is contamination, when you factor in that this is going ...