>> reporter: they are now, apparently. they haven't always been cooperating, though. they didn't really want to answer questions. they pointed police to their lawyer, early on. but just about a week or so ago brian laundrie's dad did come out with authorities and search this area. tried to show them where his son's favorite hiking trails are, where he liked to camp. and then just last night, we're told by the family attorney that roberta and chris laundrie called the fbi, called north port police and said we want to go search for our son in the morning. we plan to do that. so law enforcement accompanied them on that search as well. we did interview the spokesperson for the north port police department for this documentary that we did on gabby petito. and he said that, you know, early on they wouldn't answer questions about why gabby petito might have been missing. they also waited four days to report their own son had disappeared. so he said that police described their behavior as odd. here's a bit more of that conversation. why do you think brian