An Arches National Park ranger warned Gabby Petito that her relationship with Brian Laundrie seemed 'toxic' after fight

National Park Service ranger Melissa Hulls, the visitor and resource protection officer at Arches National Park in Utah, responded to a call of a domestic incident between Gabby Petito, 22, and her fiancé, Brian Laundrie, 23, near Arches while the couple was in the middle of a cross-country road trip.