Joyce Hefnerklein, also known as Joyce M. Hefner and Joyce Marie Klein, was 30 when she was last seen in Fairbanks, Alaska, on April 28, 1984. A mother and wife, her disappearance became tied to a string of violent crimes that summer. Authorities believe she may have been murdered by a drifter named Michael Silka and that her body could have been disposed of in the Tanana River near Manley Hot Springs.

Those events are linked to a larger sequence of disappearances in May 1984 that included several people reported missing from the Manley Hot Springs area, among them Roger Culp, Albert Hagen and Joyce’s young son, Marshall Klein. Law enforcement later confronted Silka; a shootout left an Alaska State Trooper and Silka dead, but the presumed victims’ remains were never recovered from the river, and their fates remain unresolved.

Anyone who knew Joyce, her family, or who has information about the Fairbanks or Manley Hot Springs disappearances is asked to come forward.