florida for the fiance, a person of interest in the case, nbc news international correspondent miguel almaguer has more. reporter: gabby petito s body was officially identified, the coroner now ruling her death a homicide, discovers in the remote stretch of teton mountain range, authorities have not yet said how she died, but named her missing fiance brian laundrie has a person of interest. from day one, brian laundrie has done nothing other than help himself and buy time so he can cover his tracks and his actions. reporter: 2500 miles away in florida, the intensified search for laundrie in the alligator-infested swampland. laundrie s parents told investigators he came to the 2500 acre reserve for a hike, the day before he was named a person of interest in his fiancee disappearance. terrain very difficult,