Ryan ChartrandThe San Luis Obispo Police Department received John Michael Rivard’s toxicology results Tuesday. No drugs or blood alcohol were detected.
The police received the results from the San Luis Obispo County Coroner’s Office.
Police responded to a 911 call made by Rivard Oct. 3 and found the bodies of John Rivard, 48, his 44-year-old wife Barbara and his 7-year-old daughter Olivia in their home at 1770 Frambuesa Drive. The Rivards’ two other children were unharmed.
After an extensive two-week investigation, police announced Oct. 18 that they determined Barbara’s head was severely beaten with a flashlight by John while she was in Olivia’s room.
He then shot and killed Barbara while using a pillow to muffle the gunshot, police said. He reportedly later did the same to his daughter and then shot himself.
The San Luis Obispo County Coroner concluded that Barbara and Olivia each died from a single gunshot to the head, though the trauma that Barbara sustained to her head was a contributing factor in her death.