(NewsNation) — The fiancé of a missing pregnant woman and her sister are in custody after her body was found at a park in Michigan, according to multiple reports.

Richard Falor and Kimberly Park were arrested after a body resembling Rebecca Park’s was discovered by her father in Manistee National Forest earlier this week while he was out searching for her in an area near Park’s mother’s home.

Park’s family reported to police that her cellphone was found discarded in the area where her body was found.

“There was no formal search party in that area,” Wexford County Sheriff Trent Taylor said. “Citizens were searching … in that area, and they found the body.”

Park, who had been missing since Nov. 3, was last seen getting into a dark-colored vehicle outside a relative’s home in Boon Township, according to police. On the day she disappeared, Park had arranged to be picked up. She did not disclose who would be picking her up.

Investigators said Park received $2,000 from a family inheritance the day she went missing, which police believe could have helped her avoid electronic tracking.

At the time of her disappearance, Park was reported to be 38 or 39 weeks pregnant.

Police said the status of Park’s child was not clear.