Gabby Petito Case: 'In Pursuit' Host John Walsh Reveals His Theories On Brian Laundrie's Whereabouts

As autopsy results have revealed more about Gabby Petito's death, her fiancé Brian Laundrie remains missing. John Walsh, who has tracked down 26 fugitives in three seasons of his show "In Pursuit," shared with Access Hollywood his reaction to Petito's cause of death and his thoughts on who killed her, as well as his theories as to where Laundrie could be. "Gabby Petito: ID Special Report," in which Walsh and other experts dissect the details of the case, airs Oct. 13 at 9PM on ID.