Arnold Archambeau and Ruby Bruguier.

MUS-2026-297

Index entry. Case details compiled from public reporting; our researchers have not verified this file yet.

Arnold Archambeau, 20, and Ruby Bruguier, 18, a young Yankton Sioux couple, walked away from a pre-dawn car crash near Lake Andes, South Dakota, on December 12, 1992, leaving a teenage passenger in the car. They vanished for three months. In early March 1993 both bodies were found in a water-filled depression near the crash site that searchers had repeatedly walked. Bruguier was badly decomposed while Archambeau was far less so, suggesting they died elsewhere and were placed there. The cause of death was recorded as exposure. The FBI closed the case in 1999, finding no evidence of a crime. No arrests were ever made.

1. Dec 12, 1992

   Car driven by Archambeau crashed in a frozen ditch near Lake Andes. Archambeau, 20, and Bruguier, 18, left cousin Tracy Dion in the car and disappeared.

2. Early Mar 1993

   Both bodies found in a water-filled depression near the crash site. Bruguier badly decomposed, Archambeau far less so. A tuft of Bruguier's hair found along the roadway. Cause of death determined as exposure.

3. Apr 14, 1995

   Unsolved Mysteries segment aired. Leads generated proved valueless.

4. Sep 1999

   FBI closed the investigation, unable to find evidence a crime was committed. No arrests ever made.

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• Wikipedia: Deaths of Arnold Archambeau and Ruby Bruguier
• Grunge: The Mysterious Deaths of Arnold Archambeau and Ruby Bruguier Explained
• Unsolved.com: Arnold Archambeau and Ruby Bruguier