dad less than 24 hours after strangulation was revealed as the cause of gabby petito killing kurt her longtime boyfriend brian is the only person of interest and has been missing for almost a month. here now is john walsh, the stove in pursuit with john wals on investigation discovery. his special report airs tonight or he always great to have you. i heard you on the call yesterday with the coroner s office asking why in the world that brian laundrie hasn t been accused of being a murderer. is it your sense, john, that they don t have the evidence here they need? i think they re doing it for two reasons and i really don t understand. i am an fbi and of the year twice, and i ve had 17 guys and work together in tandem so why they haven t released that nationwide warrant for homicide and let everybody income of the marshals and everybody else. we need to catch this creep.