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Hefner was last seen in Dallas, Texas sometime during the first week of May, 1984. She had reportedly gotten involved with a married co-worker at the Friendship Ford Dealership in Carrolton, Texas. The man wanted to take Hefner to San Jose, California to rent an apartment. Sometime during the first week of May, Hefner borrowed a male friend's car. That same night, she returned it. Her friend heard a car driving away, and when he woke up, Hefner was gone. She has never been heard from again.
It's possible that Hefner traveled to Louisiana after she was last seen. Her whereabouts remain unknown.