“It appears that a little boy died in his mother’s arms as she was trying to save him during this horrific massacre,” Orange County District Attorney Todd Spitzer said at a news conference Thursday, though he later added the exact nature of their relationship was still under investigation.
“The preliminary motive is believed to be related to a business and personal relationship which existed between the suspect and all of the victims,” Orange Police Department spokesperson Lt. Jennifer Amat said in a news conference Thursday.
“This was not a random act of violence,” she said.
Five calls to 911 came in around 5:34 p.m., Amat said, and officers were at the complex about 30 miles south of Los Angeles about two minutes later.
When they arrived, they heard shots being fired inside, but they were not able to enter immediately. From the inside, gates to the building’s courtyard were locked “using a bicycle-type cable lock,” Amat said.
It is unclear if they were meant to keep the victims inside or officers out, police officials said.
What police found when they entered
After engaging with the suspect and firing shots, police used bolt cutters to enter the courtyard and found the suspect, who was injured, and took him into custody. Police had earlier said it was unclear whether his injury was self-inflicted.
In the courtyard, police also found the boy and the adult woman who survived. She was taken to a local hospital, where she is in critical but stable condition, Amat said.
Besides the boy, those killed were two women and a man, Amat said.
One of the women was found upstairs on an outdoor landing. The man was found inside one office building, and the other woman was found in a separate office building, according to Amat.
The suites where some victims were found belonged to a business identified as Unified Homes, Amat said, a real estate business specializing in mobile homes.
Investigators recovered a semi-automatic handgun and a backpack containing pepper spray, handcuffs and ammunition, which authorities believe belonged to the suspect.
The Orange Police Department on Friday identified the four victims as Matthew Farias, 9; Jenevieve Raygoza, 28; Leticia Solis Guzman, 58; and Luis Tovar, 50.
Police identified the suspect as Aminadab Gaxiola Gonzalez, 44, of Fullerton, California. He is at a local hospital in critical but stable condition, Amat said.
Authorities said he would be arraigned Friday afternoon and would face four counts of murder, one count of attempted murder, and two counts of attempted murder of a police officer.
“Prosecutors are also alleging the special circumstance of multiple murders,” according to the district attorney’s office.
CNN is working to determine whether Gonzalez is represented by an attorney who would comment on his behalf.
Gonzalez, who is believed to have been living in a motel room in Anaheim, arrived at the complex in a rental car and parked it in a lot nearby, Amat said.
A preliminary investigation by law enforcement officials concluded the suspect used a legally purchased firearm, she added.
Authorities remained on scene Thursday to complete the investigation.
Spitzer said investigators were there for two reasons: to investigate the mass shooting, as well as the officer-involved shooting aspect of the case, to ensure both objectivity and transparency.
Spitzer emphasized that the suspect is eligible for the death penalty under California law because there were multiple victims.
Prosecutors are also looking into whether the fact that the gates were locked constitutes “lying in wait,” Spitzer said, a special circumstance that would also make the suspect eligible for the death penalty.
During his tenure, Spitzer said he had reviewed nearly 20 murder cases for whether to pursue the death penalty, but he has never filed one death case.
“Asking a jury to pass down a verdict of death is the most serious consequence we ask, and it’s the only consequence where a jury makes the decision as opposed to a judge,” he said.
CNN’s Alexandra Meeks, Sarah Moon, Joe Sutton and Holly Yan contributed to this report.