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From left, Valerie Tubaces, Chad Sovanasy and Samantha Bunma hold a photo of their mother and family matriarch Leam Sovanasy, 76, who was was found brutally stabbed to death in her Long Beach home January 31, 2009. (Stephen Carr/Staff Photographer)

LONG BEACH - Mother's Day had always been a crowded and festive occasion for the Sovanasy family.

Each year, dozens of children, grandchildren and great-grandchildren would flock to the small home on Peterson Avenue to pay their respects to 76-year-old Leam Sovanasy, a mother of 10 and Cambodian family matriarch.

But on Sunday, the family was instead mourning a tragic loss.

"Mother's Day was the worst day of our lives," said Sovanasy's daughter, Samantha Bunma.

Leam Sovanasy was found brutally stabbed to death in her home on the morning of Jan. 31, and the family say they are no closer to finding the killer.

Bunma said the family believes the murder could have been the result of a home-invasion robbery, but for now, no one but the killer knows what happened.

Family members now fear for their own lives.

"We're always looking behind our backs," Bunma said. "We're afraid to sleep. Each day we live in fear."

In keeping with Buddhist tradition, the family on Monday held a special prayer ceremony to mark the 100th day of Sovanasy's death. While the ceremony is meant as a final prayer to say goodbye, many are having a hard time letting go, Bunma said.

"Who could do this to a 76-year-old woman?" she asked. "She didn't have the energy to fight anyone."

Sovanasy was rarely alone in the home she had lived in since 1980, but on that Saturday morning at about 10:30 a.m., it seemed as if everyone was