After checking out of the Super 8 motel in Grand Junction, Colo., LeAnn Emry is never heard from again.
Kimball later told a fellow inmate that he killed LeAnn after telling her they were going for a hike in Bryson Canyon in eastern Utah.
According to that account, Kimball told her to strip nude and to kneel down before shooting her in the head.
Kimball has since claimed that members of a drug gang executed LeAnn and he was only a witness.
LeAnn, 24, was shot with the gun she bought a few days earlier.