RAPID CITY, S.D. (AP) — An autopsy indicates the Wyoming man found dead near a South Dakota interstate likely died of hypothermia.

The body of 45-year-old Justin Johnson was found Sunday evening near some railroad tracks between Wall and Wasta in Pennington County near Interstate 90.

Sheriff's officials say there's no indication the death is trauma related. The autopsy was done Tuesday. Johnson was from Hulett, Wyoming.

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