gabby petito's death, homicide. the fbi now asking the public for assistance. some tips to the fbi proving valuable. a second person says he witnessed a domestic dispute between petito and laundrie on august 12th and gave a handwritten sworn statement saying, in part, they were talking aggressively at each other and something seemed off. at one point, they were sort of fighting over a phone. i think the male took the female's phone. it appeared he didn't want her it in the white van. and from my point view of, something definitely didn't seem right. another witness, jessica schultz, a woman who was camping in wyoming says in a tiktok video that she alerted the fbi when she spotted a white van suspiciously parked for several days. >> some friends and i were camping from the 22nd to the 29th. we all independently noticed that van parked there. and i noticed it particularly because i had seen it trying to park, and also because it wasn't