Lisa Pearl Briseno, 28, was last seen in Portland, Oregon, on August 20, 1997. A member of the Confederated Tribes of the Warm Springs Reservation of Oregon, she was described as 5 feet 4 inches, about 200 pounds, with black hair and brown eyes, wearing a cream-colored blouse and blue flowered pants. She was seen leaving with her boyfriend in his white 1983 BMW; the vehicle was later recovered but did not reveal Lisa’s whereabouts. Her sister reported her missing on August 27, 1997.

The boyfriend was reportedly uncooperative with police, and the family says the initial investigation by the Portland Police Bureau fell short. The family held a service for Lisa and the Confederated Tribes of Warm Springs consider her deceased, though no body has been found. DNA from family members has been submitted to national databases in hopes of a future match.

If anyone knew Lisa, her routines, or saw that white 1983 BMW in Portland around August 20, 1997, please share what you know.