The autopsy has been completed on the adult female found dead in a Bonita home.
The cause of death has been ruled death by a signal gun shot, and the manner has been ruled suicide, the San Diego County Sheriff's Department reported.
As a result of the autopsy, and in conjunction with other facts established during the investigation, Sheriff's Homicide is ruling this incident a murder/suicide.
The investigation is continuing and updates will be forthcoming. Identities of the decedents have not been confirmed. The autopsies on the two children have not yet been completed, the Sheriff's Department reported.
The woman believed she was being followed recently, it was reported Wednesday.
Ana Marcia Ochoa-Fernandez said she was living in fear for her life, neighbors told The San Diego Union-Tribune.
Her husband was kidnapped in Tijuana two years ago -- not long after winning a $20 million court judgment -- and was never heard from again, according to the newspaper.
Sheriff's deputies were called to the house in the 3000 block of Sylvia Street around 8 a.m. by the woman's daughter, who said she had not talked to her mother in about a week, Lt. Tom Bennett said.
"The concern for foul play was increased due to an accumulation of mail (and) newspapers, and pets not being fed," Bennett said. "Based on the circumstances, the deputies decided to force entry to the home."
Due to an array of household security equipment, including reinforced doors and grills over the windows, the deputies needed firefighters' help to get inside.
The bodies of who authorities believe were Ochoa-Fernandez and her sons, Jose Jr., 10, and Angel, 3, showed no obvious trauma, Bennett said.
The boys' father Jose Fernandez, was kidnapped in front of them in Tijuana, but the family was unable to meet ransom demands, neighbors told the newspaper.
Susana Jimenez, the next-door neighbor, said she still can't believe what detectives found inside the house.
"I'm very shocked -- very saddened," Jimenez said.
"It really freaks me out. I don't know how to put it in words. It's gone to the heart, really," neighbor Brenda Jackson said.
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