The unidentified woman has been found safe, according to the Oceana County Sheriff's Department.
"It sounds like she had been hiding," Undersheriff Tim Priese told MLive. Her name is being kept private "because of the whole suicidal thing" and she is receiving medical treatment.
The 43-year-old woman disappeared on Sunday evening and was discovered around midnight on Monday after apparently emerging from a crawl space in her home.
The home was searched "at least a dozen times" and authorities are skeptical about the woman's claims that she was there the whole time.
"There's a potential for her to have slipped back in the house when we weren't there," Priese said. "We're not totally believing everything."
It's possible that the woman will face criminal charges.