Audio: (Warning: Contains graphic content) Edited 911 call from Danielle Blixt.

Audio: Listen to the 911 call from a neighbor (abridged - 3:10)

Video: Five found dead at Temecula home

Video: Flyover of the site of multiple shootings in Temecula

As she drove from the Temecula home where two family members and three others had been fatally shot in a murder-suicide, 15-year-old Danielle Blixt made a frantic 911 call.

"Ma'am, you need to calm down," the 911 operator says in a recording of the call made Nov. 11, 2007 and released Tuesday. "We can't understand you when you're yelling. What is going on?"

"My dad and his girlfriend and her children and my brother. They're all beaten to death in the backyard," Danielle sobs into her cell phone. "They're dead. I thought they were just kidding around. I thought it was a joke. It's not a joke. They're bloody and beaten to death."

What Danielle did not realize at the time was that all five had been shot and her brother was the gunman.

After a lengthy investigation, prolonged by delays in forensics tests, sheriff's officials confirmed Monday that 17-year-old Matthew Blixt shot his father, Jeffrey Blixt, 45; his father's girlfriend, Naomi Grangroth, 34; and Grangroth's 15-year-old twins, Narissa and Nikita Williams, before turning the gun on himself. The 9 mm semiautomatic handgun Matthew used belonged to his father and was kept unsecured in the house, said sheriff's homicide Lt. John Schultz. Investigators said Matthew left no note and they declined to speculate about his motives.

Jeff Blixt had brought his son and daughter and his girlfriend's family together at his Iron Circle home in the Temeku Hills subdivision for a Sunday afternoon barbecue. Blixt and his wife were divorced and the children lived with their mother in Desert Hot Springs.

Reached by phone Tuesday, Danielle declined to comment. Her mother did not respond to a request for an interview.

On the 911 recording, Danielle said she fled the house in her father's pickup after discovering the bodies. She tried to call 911 several times, but she said no one picked up. Although she was just blocks from the home, when Danielle finally got through to an operator she was so distraught and disoriented that she struggled to describe her location. She could not recall her father's address.

"This can't be happening to me. ... I don't know what's going on," Danielle said between sobs.

After telling the operator repeatedly that all five had been killed, she cried, "They're dead. My family is dead. What else do you want me to say? I don't know who did it. I don't know how it happened. All I know is that they're all dead."

Danielle told the operator she had been in her bedroom talking on the phone.

"Because I was mad," she said. "Because I didn't want to sit there with my dad and his girlfriend.

"I heard a scream and it was just one and it didn't seem like a big deal. You know, cause she's a very loud person," she said. It is unclear whether Danielle was referring to her father's girlfriend or one of the twins. "I didn't think, in my head, somebody was in there beating them. I didn't hear my brother. I didn't hear my dad. ... or anything at all. And next thing you know I was looking for them. Because my dad was bothering me earlier and he wanted me to go out and spend time with them."

The operator asked where she found them.

"The two daughters are laying in the living room. One of them, I think, is alive because she's shaking. ... And I tried to tell her to get up. And she won't get up. And I don't want to touch her because I could make it worse for her. And I don't know what to do. I don't know what to do."

When she saw red on one of the girl's faces, Danielle said, at first she thought it was felt pen marks, that the girl had fallen asleep and someone wrote on her face as a prank.

As she tried to make her way to the Burger King parking lot on Rancho California Road to meet a police officer, Danielle told the operator, "I heard her scream. I didn't know it was her though. I didn't know what was going on. They were watching movies. ... I heard her scream. And I heard a loud noise but I thought because they were barbecuing or something. She's, I mean, she's an outrageous person. I thought she was just screaming. I didn't ... my God."

Danielle said she found her brother, father and his girlfriend lying in the backyard.

"And I tried to get my brother up and he wouldn't get up. And I tried to get my dad up and he wouldn't get up. So I searched for keys everywhere -- I had to get out of there. I couldn't be there. ... And I found keys in my dad's pocket. ... I just left."

"Please ... I'm only 15. I can't do this ... this isn't fair," she said.

The operator tried to calm her, telling her someone was on the way to help her.

"No, I don't need help," she sobbed. "My dad and my brother. ... My brother isn't OK. My brother's dead. You know, he had so many problems in life. But he's a good (inaudible). And I know he's in (inaudible). Oh my God."

Reach Sarah Burge at 951-375-3736 or sburge@PE.com