Brian Laundrie's parents knew "whereabouts" of Gabby Petito's body, lawsuit says

New details have surfaced in the lawsuit filed by the parents of Gabby Petito. CBS Miami reports the Petitos amended their lawsuit, alleging that during the search for Gabby, Brian Laundrie's parents knew their son had killed her and knew "the whereabouts of the body."

Petito disappeared while on a cross-country trip with her fiancé, Laundrie, last August. Laundrie returned to Florida alone.

Petito's body was found in Wyoming in September, a little more than a week after her family reported her missing. A coroner ruled she died from blunt force trauma to the head and neck and strangulation.