According to the coroner's office, 58-year-old Beverly Green Harmon and 62-year-old Wendell Harmon died of multiple gunshot wounds.
Their bodies were found on the evening of Friday, Dec. 20, when deputies from the Los Angeles County Sheriff's Department's Altadena station responded to the 700 block of West Sacramento Street, near Casitas Avenue, for a welfare check.
It's unclear what prompted the shooting that left the Harmons dead. So far, no one's been arrested in the case.
Meanwhile, the couple's family held a candlelight vigil Friday where the couple lived.
"I can't sleep. It's traumatic," Monica Harmon, the victim's sister, said at the vigil. "Just knowing that somebody is out there and they would do something like this to them is unsettling."
Loved ones described them as the ultimate power couple.
Wendell worked for Pasadena's Parks and Recreation Department. Beverly spent decades in finance before launching a home health aide business.
Beverly and Wendell Harmon were married for more than 30 years, according to family members.
"I know I can never bring them back, but right now I can't even function," Monica Harmon said. "I can't function. I don't know what my life is going to be like without them."