laundrie's dna, if they find him dead or alive in the reserve. they could possibly match it to the crime scene where petito's remains were found. perhaps the killer dropped a gum wrapper or something. we have information about the police stop an august 12th in moab, utah. somebody called 911 to say that they saw a man slapping a woman. grand county sheriffs dispatched moab mipolice to stop them. in the call, you'll hear them say a male slapped a female. listen. >> do you have the phone number, maybe a landline and location where the victim is at? >> phone number is [ muted ]. the female who was hit, the male and female, got in the van and