Margaret Yossa

Do you know who murdered Margaret Yossa in 1994?
Margaret Helen Yossa was a woman who dedicated her life to education. Born in 1927 in Butler County, Pennsylvania, she eventually made her home in the coastal city of Oceanside, California. At 66 years old, she was a committed and caring instructional aide at Mission Elementary School, where colleagues and students remembered her as a positive influence on many young lives. Her sudden and unexplained disappearance in early 1994 would leave her community shaken and begin a mystery that endures to this day.

On the evening of February 15, 1994, Margaret was last seen at her Oceanside residence. Her vanishing was deeply uncharacteristic, raising immediate alarm among those who knew her. The day after she was last seen, her car was found abandoned in the parking lot of a local Ralph's grocery store on Oceanside Boulevard. There were no signs of a struggle or any immediate clues to indicate what had happened to her. For seven agonizing months, her family and friends waited for answers, but there were no leads and no sign of Margaret.

The search came to a devastating end on September 13, 1994. The skeletal remains of Margaret Yossa were discovered in a field in the Oceanside area. Some reports indicate a mountain biker found her remains off Palomar Airport Road in the neighboring city of Carlsbad. Due to the condition of her remains after months of exposure, it was difficult for investigators to determine a precise cause of death, and with a lack of evidence, the case soon grew cold. No one has ever been arrested or charged in connection with her murder.

The Oceanside Police Department’s investigation into Margaret’s death uncovered unsettling parallels to another local unsolved case. Two years earlier, in April 1992, Mary Elizabeth Rico, a 50-year-old woman, had vanished from her home. Like Margaret, Mary had also worked as an instructional aide at Mission Elementary School. The two women knew each other, were employed at the same school, and lived within a mile of one another. Most disturbingly, on the respective days they each disappeared, both women had been shopping at the very same Ralph's grocery store.

Mary Rico’s disappearance was also suspicious; her son found a broken patio door, smeared blood on her bed, and a cut telephone line at her home, though she has never been found. Despite the striking similarities in their lives and last known activities, police have never publicly announced a definitive link or concrete evidence connecting Margaret’s murder to Mary’s disappearance. The cases remain officially separate, two hauntingly similar tragedies that unfolded in the same small community.

Decades have passed, but the murder of Margaret Yossa remains an open and active cold case with the Oceanside Police Department. Her death left a lasting scar on the community, a reminder of a killer who was never brought to justice. Vigils and memorials have been held in her memory, honoring the dedicated educator whose life was tragically cut short. Investigators still hope that with advancements in forensic technology, old evidence may yield new clues, or that someone with long-held information will finally come forward. As of February 2025, Margaret’s case is still unsolved, and the search for answers continues.