The former Hooters waitress who survived a month alone in the woods may have gotten lost because she was high on meth, police now say.

Student Lisa Theris was found wandering by a US highway caked in mud and covered in scratches after spending nearly four weeks alone in the forest.

Now the Mail Online reports how police think she may have gotten lost because she was high on drugs.

Cops suspect she may have been suffering from hallucinations brought on by taking meth.

And bizarrely, the two men she allegedly took drugs with were so sure the 25-year-old was dead, they started accusing each other of her murder.

Manly Davis, 31, and Randy Oswald, 36 — who were arrested after allegedly breaking into a hunting lodge in Midway — are understood to have been quizzed over her disappearance.

It was earlier alleged that Theris was with the men but did not want to be part of the robbery and ran into the forest to escape.

Reports also claim she emerged just two days after criminal charges against her were dropped when she was presumed dead, according to the Daily Mail.

Pictures show her body covered in bug bites after the legally blind radiology student struggled through the forest completely naked.

Snaps show how her skin was left cracked from dehydration after she drank muddy water and squeezed the moisture from her hair to stay alive.

But it has since been revealed how she started taking drugs in the months before her disappearance.

Questions are now being asked about her miraculous survival.

Davis is said to have told police she leaped out of their truck as they attempted to ram the metal entry gates and fled.

Oswald is reported to have told them Davis had shot the girl in the head, placed her body in a garbage bag and tossed it into a creek.

Bullock County Sheriff Raymond Rodgers told DailyMail.com: “They were so geeked out that they started blaming each other for a murder that didn’t happen.

“They were as relieved as we were when she walked out of those woods. They were thinking they killed her.”

He added: “We are thinking they were all pretty much on drugs.

“‘Me personally, I think she was on meth, she was hallucinating and she just got lost in the woods.”

Theris told NBC12: “I just did what I could. I just knew that when I was thirsty, I had to drink, no matter if the water was dirty or what.

“I had to get as much of it as possible. Sometimes it would make me very sick.”

She added: “I thank God for the berries. There were always pretty much berries.”

Theris hobbled through the vast wilderness barefoot for 25 days with the help of a staff she made from the roots of a tree as she searched for signs of civilization.

She said: “You can’t imagine how large of an area it was. I couldn’t believe it.

“I kept thinking I would find a person or a house, even if it was empty, but there was nothing.

“Nothing but nature. That’s it.”

Eventually the former Hooters waitress said she stumbled upon a main road, where she was rescued by a “wonderful” passing motorist from Florida, who gave her clothes and waited with her until help arrived.

Now recovering after having reportedly lost 40 pounds during her ordeal, Theris said: “I’m just so happy to be home and recuperating.

“I just thank everybody for the prayers and support. It means a lot.

“Just being out of those woods is just the most amazing thing.”

Theris is now limited in what she can tell reporters as there is an ongoing police investigation, NBC reports.