Christine Lorraine Brock was last seen in Warren, Ohio, on August 10, 2000. She was talking on a payphone at the Asian Garden Restaurant at the time. She has never been heard from again.

At the time of her disappearance, Brock's life was troubled by a failed marriage, miscarriage, and involvement with drugs and sex work. A child she once babysat for reported seeing her at Niagara Falls in Canada a year after her disappearance. The sighting has not been confirmed, but her mother believes it was genuine.

Her case remains unsolved.