SPO4 Armando Orden was on the drivers seat of his owner-type jeep when one of the men casually approached him and shot him in the head.
Ordens wife Erlinda was hit by a stray bullet in the chest. She died while being rushed to the hospital.
Parang police probers believe the couples killers were hired guns.
The First Marine Brigade fielded a dozen plainclothes agents to help police investigate the killing. John Unson