The OSBI is asking for help to identify a woman found in a shallow grave near Norman.
The medical examiner says she was found six years ago near Lake Thunderbird, but they have not been able to match her DNA with an identity.
A forensic artist has reconstructed her skull to give a likeness of what she could have looked like.
She also had a distinct sunburst tattoo on her back.
She was 5' 5", 30-45 years old and had given birth to at least one child.
Investigators say she was in the grave between 3 months and a year.
Anyone with information is asked to call the OSBI hotline at 1-800-522-8017.