Brian Laundrie cadaver dog search details: Inside investigation strategy

As the search for Gabby Petito's fiance Brian Laundrie continues with a cadaver dog at the Carlton Reserve, a retired NYPD detective gives an inside look at some of the investigation strategies likely being used and how the Laundrie family holds the key to the case. Joe Thompson told LiveNOW that there are also questions about whether Laundrie is dead or alive, and if he is alive, could he be getting help while he is on the run?