A nearly 50-year mystery in Oregon has just been solved. DNA technology has finally confirmed the identity of a young woman whose remains were discovered in the state’s mountains back in 1976.

Authorities say the remains belong to Marion Vinetta Nagle McWhorter. She was just 21 years old when she disappeared in 1974 after a shopping trip in Tigard, Oregon—a suburb of Portland.

Two years after she vanished, skeletal remains were discovered along a creek in the Central Cascades. For decades, investigators could not determine to whom they belonged.