LALate has the property records on the home burned down at the start of the domestic dispute turned rampage shooting in Santa Monica, right near where I lived in 1981-82. The owner of the house appears to have been the now late Samir Zawahri, father of the presumed shooter. The LA Times reports:
Firefighters later found the bodies of two men inside the house. Police sources, who requested anonymity because of the ongoing investigation, said the men were Samir Zawahri, 55, the owner of the house, and one of his adult sons. A second son is suspected of being the shooter, the sources said.
Probably not. This sounds like the usual domestic murder-suicide, just given the evil recent twist, a la Newtown or Chris Dorner, where the guy kills a family member or some other personal enemy, then decides, rather than just shoot himself in the traditional manner, to go out big like his favorite video game or media anti-hero.