Williston, N.D. (AP) Two people from Montana are charged with the kidnapping their 84-year-old uncle from North Dakota's oil patch.
The McKenzie County sheriff's office says Sandra Potter was arrested Friday in her Worden, Montana, home. She's in her mid-60s.
Thomas Potter is also from Montana but was arrested near Yuma, Arizona. He's in his mid-50s. The uncle, Robert Gross, was with him.
Affidavits say deputies and an FBI agent visited gross' home in East Fairview, North Dakota, last week and determined he was missing.
Investigators have been working the case since at least September.
The affidavit says Sandra Potter acted as Gross' caregiver but kept him in "deplorable conditions'' living inside a trailer with no running water. It also says she had the victim sign over an oil well interest to her.