also joining us, sergeant wayne conrad, california department of corrections and rehabilitation.e cell phone unit and his four legged partner is dracco. >> so you're going to give us a little idea how this works. i can understand finding tobacco and cigarettes and things like that. but the cell phone has me baffled. i don't know what a dog will be smelling. how do you train them to find a cell phone? >> well, like anything else it has to have a unique odor. when we first started this program, that is one thing we had to determine. once we were able to determine that a cell phone did have a unique odor, the training was basically the same as any other type of detection. >> guys, give us a sample. we set up -- i believe we set up three things you have hidden, right? marijuana, a phone and what else? >> we have marijuana, tobacco and a cell phone hidden in here. and in this particular dog, he's trained for sick scents. we just had narcotics dogs. and our contraband dogs. on the contraband dogs, we use them inside the prisons only. we can't use them for probable cause. so we decided