ALBUQUERQUE, N.M.—New Mexico State Police say medical investigators have confirmed the identity of a body a found in a cave at El Malpais National Monument as that of a missing Albuquerque man.

They say it was 23-year-old Fernando Enriquez. He had been reported missing in early November.

Two men were arrested earlier this week in connection with Enriquez's death after investigators tracked the use of his credit card to the Grants area. Bryce Franklin and Clifford Bearden are facing open counts of murder and other charges.

State police say Franklin's mother, 51-year-old Sandy Franklin, was arrested Friday night and charged with conspiracy to tamper with evidence.

It wasn't immediately clear if the three had legal representation.

State police say they're continuing to investigate, along with the Grants and Albuquerque police departments.