those areas. a lot of thick under brush out there. both of the boys the mom and dad not married in this case, by the way, they live together and they have children from previous marriages and both of those children were inside the house when little lisa disappeared, and police have spent hours interviewing the parents. listen to them. as you can imagine nobody knows more about what is going on in that house than the parents do. they were cooperative with us all day yesterday and into yesterday evening as well. they were interviewed all the way up until 10:30 or 11 last night and they were cooperative. it had been a long day for everybody and the interviews ended about that time. reporter: the f.b.i. has been brought in, the marshals have been brought in, even immigration and customs enforcement. this is an all hands on deck situation trying to figure out. if there was a baby monitor inside that room or not. right now that is very unclear. you see the picture on the left