Dog the Bounty Hunter doesn't believe Adam did it.

The lesbians reported a "creepy guy" stalking them at their campsite, and in fact one of them even said that if they're found murdered, he did it.

They were murdered the next day.

Dog stated that they wouldn't have referred to Adam as "a creepy guy", and instead would have named him, as the older lesbian actually knew him from work, and in fact had an altercation with him at one point.

However, this doesn't rule out Adam. It's possible that they couldn't see Adam's face, and didn't realize it was him. It's possible that the "creepy guy" was a coincidence, and had nothing to do with the murder. It's possible that Adam never got close enough to them to be recognized, especially at night.

I will say that Adam bolting town the day after the murders (not even picking up his paycheck), telling someone he killed two women in Utah, and helsing himself is pretty strong.