The Oklahoma State Bureau of Investigation is helping the Tonkawa Police Department search for a missing woman whose vehicle was found abandoned on the Interstate.
Tonkawa police asked for the OSBI's help in finding 60-year-old Cathy Ann James after officers received a call from the woman's sister.
She told officers that she hadn't seen or heard from Cathy since September 4. According to police, Cathy was last known to be in Tonkawa.
OSBI agents found Cathy's car abandoned on Interstate 35 at mile marker 179 — just three miles north of the Stillwater exit.
Cathy was last seen wearing an orange shirt featuring the Nike emblem and black sweatpants.
If you've seen Cathy or have any information on her whereabouts, please contact the OSBI or send them an email.