YANKTON, S.D. (AP) — The family of a Yankton woman slain nearly a quarter century ago is making a renewed effort to find her killer.

The body of Tammy Haas was found 23 years ago in a ravine along a Nebraska highway just across the South Dakota border. Nineteen years ago, a jury found her boyfriend not guilty of manslaughter.

The Argus Leader reports that Haas' family last month hired private detectives to work on the case, using $24,000 raised through social media. The Facebook page "Justice for Tammy Haas" has grown to more than 5,000 followers. Also in April, "Dateline NBC" listed the slaying in its "Cold Case Spotlight."

Mother Nancy Haas says the family hopes someone with knowledge of the case will come forward with information.

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