TULSA -- A murder investigation was opened by Tulsa Police after detectives discovered that a woman who went missing in 1981 was shot.
Monday, remains exhumed in 2015 were positively identified as Francine Frost after a DNA test.
Investigators are now trying to find out more about the circumstances and why Frost was killed.
Detective Margaret Lovell with the Tulsa Police Department says, "The location of a missing person's remains is a very huge part of the investigation. It's a very pivotal clue because it tells you something about the suspect. There's a reason why a person's remains end up where they end up."
Detectives have not yet named a suspect in Frost's death.
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