Barbara Lenz, 31, was last seen on May 6, 1989. After 36 years later, her former boyfriend Robert Davis, 61, was arrested and ...

Robert Davis was the last person to see his girlfriend Barbara Lenz alive before she vanished in 1989, Iowa investigators ...

Robert Allen Davis, 61, of Council Bluffs, was arrested Monday and charged with first-degree murder more than three decades after his then-girlfriend Barbara Lenz disappeared in Harrison County.

The woman’s body has not been found, but investigators believe the now 61-year-old man had a “motive to kill” his girlfriend.