Monica Arellano was 7 when she was last seen at her Yuba City, California, home on July 26, 1999. On that day her mother, Blanca Alicia Duenas Arellano, was found at the home stabbed multiple times. Monica and her younger brother, Victor, disappeared the same day.

Authorities consider the children’s father, Francisco Arellano, the prime suspect in Blanca’s murder. He had a prior conviction for spousal abuse and Blanca had obtained a restraining order alleging threats that he would kill her and take their children to Mexico. After the killing Francisco fled, and investigators believe he may have taken Monica and Victor across the border.

Neither Monica, Victor, nor Francisco have been located and the disappearances remain an active investigation. If anyone has information about Monica’s whereabouts or the events of July 26, 1999, contact the investigators handling the case.