A friend, who used to live in Billings, sent me link to story in Helena Independent Record newspaper.

Excerpts, in case link disappears: "...went missing around dusk Sunday in rugged country...[victim] and a hunting friend apparently separated in the early evening on Sunday...[victim] found unconscious but alive around 11 p.m. Monday in a remote area but died of hypothermia just after 5 a.m. Tuesday...Search and rescue officials said it didn’t appear that [victim] was equipped to spend a cold night in the backcountry."

It's quite likely that a $15 ferro rod and a $4 space blanket would've made the difference.