On March 17, 2023, two people were found shot to death near a vehicle at Kempton and Brewer roads in Rio Oso, California. A local farmer discovered a blue Ford Explorer with 40-year-old Elk Grove resident Vicky Keovilayphone inside and, about 50 yards from the vehicle, 40-year-old Yuba County resident Derrick James Engelman. Both had sustained multiple gunshot wounds and were pronounced dead at the scene.

The Sutter County Sheriff’s Office opened a double-homicide investigation. About six weeks later, on May 2, 2023, deputies arrested 49-year-old Dixon resident Fredil Donaldo Flores and charged him with murder and conspiracy; he was booked into the Sutter County Jail and later bound over for trial. Authorities said they believed the incident was isolated. Details about any relationship between the victims and Flores or a motive have not been released.

If anyone knew Vicky Keovilayphone or Derrick Engelman, or has information about their movements around March 17, 2023, please share what is known.