Slain Family Buried, but Mystery Remains : Crime: The couple and their two children were found stabbed to death Oct. 20. About 300 mourners attend their funeral.

Four members of a slain Granada Hills family were buried side by side Saturday as the mystery of who killed them and why haunted their funeral.

About 300 mourners came to the Rose Hills Memorial Park in Whittier on behalf of Hee Wan Yoo, 36, his wife, Gyung Jin, 34, and their children, Pauline, 6, and Kenneth, 4. The four were found dead in their home Oct. 20, all victims of multiple stab wounds.

“Who could have killed little children so brutally?” asked the Rev. Peter Yang of Holy & Grace Presbyterian Church, as he addressed a packed chapel.

“The killer is a devil in a human mask,” Yang said. “Only God will judge. God knows who the killer is, and he’s watching.”

There were no other direct references to the Yoos’ deaths during the service, which was conducted in Korean and translated by a family friend. But the sight of four caskets together--mahogany for the parents and pale pink and blue velveteen for their daughter and son--served as a constant reminder that the family died by violence.

Four hearses waited outside the cemetery’s Hillside Chapel, and 24 pallbearers in black suits and white gloves lined up two by two to carry the family to their graves.

One small mourner, a student who had sat next to Pauline Yoo at El Oro Elementary School, presented the family with a doll and spoke simply but movingly about what an excellent student his friend was.

“We all liked playing with her,” the boy said. “Everyone loved Pauline, and we will all miss her.”

Several relatives flew in from Korea for the funeral of the Yoos, who immigrated separately to Los Angeles in the early 1980s, married, and bought a dental lab in Koreatown about three years ago. Friends and family said the hard-working couple, who were active in their church, bought their Wish Avenue home in the San Fernando Valley about a year ago.

Four Los Angeles police detectives also attended the funeral, watching the Christian burial rites intently from the back of the chapel and again at the gravesides. The officers declined to discuss the case, saying there was nothing new to report.

Police have released few details since the Yoos’ bodies were discovered. They have acknowledged finding no sign of a forced entry, and during a community meeting last week they told frightened neighbors, some of them also Korean-American, that the murders do not appear to have been racially motivated.

On Saturday, before the 90-minute service, the mothers of Hee Wan and Gyung Jin Yoo collapsed in front of the set of flowered-draped coffins, rocking themselves and keening on the chapel’s altar.

“Please find the killer, please find the killer,” Hee Wan Yoo’s mother, 77-year-old Sook Kyung Hwang, cried over and over. “Please find him for me.”