|Date|| October 18, 1988|
|Location(s)||De La Paz, Philippines|
At around 8 p.m. that night Grefaldia armed himself with an Armalite rifle and went to the house of Juan and Maria Labatete in Villa Batabat, a couple who had filed a criminal case for rape and robbery against him. He fired several rounds at the house and upon entry found the Labatete's and five of their relatives inside. Without responding to questions why he was shooting them, Grefaldia killed six of the occupants with multiple shots to their heads, while the seventh, Maria Labatete's father Domingo Camacho, survived unharmed by pretending to be dead.
After the shooting Grefaldia fled, but he was arrested in Buenavista on December 4, 1988 and charged with the murders. He denied any responsibility and alleged that he was in Bicol at the time the crime was committed. He was tried at the Regional Trial Court of Gumaca, which found him guilty of six counts of murder on November 10, 1994 and sentenced him six times to reclusion perpetua, as well as payment of P50,000 to each of the heirs of the deceased. His appeal to the verdict was dismissed by the superior court on October 30, 1998.
- Juan Labatete
- Maria Merly Camacho Labatete, wife of Juan Labatete
- Jesus Labatete, father of Juan Labatete
- Rogelio Maligaya, son-in-law of Jesus Labatete
- Tomasa Camacho, mother of Maria Labatete
- Rolando Ceda, son-in-law of Tomasa Camacho
- ↑ The People of the Philippines vs. Edgardo Grefaldia (October 30, 1998)