Jennie Wyckoff, 90, went missing from High Sierra Manor, an assisted living facility in Bishop, California, on February 2, 1996. She was last seen at night inside the facility and had a history of wandering. Staff reported her missing the next day after discovering she was gone.

Wyckoff was described as 5 feet tall and 90 pounds. At the time she vanished she wore a light-colored blouse, tan pants, and a pink and blue nightgown, plus eyeglasses, a hearing aid, and a distinctive half-carat diamond ring. Local and regional searches involving law enforcement and volunteers produced no significant clues, and her body has never been found; she was declared legally dead in 1999.

The Bishop Police Department later reopened the case after surviving family members pushed for renewed efforts and investigators began re-examining evidence with newer DNA tools and national databases such as NamUs. No conclusive evidence has been reported; anyone with information about Jennie Wyckoff, her movements at High Sierra Manor, or the night of February 2, 1996 is asked to come forward.