A little boy died in his mother's arms as she was trying to save him during a horrific shooting at an office building in Orange that left four people dead Wednesday.
JUAN FERNANDEZ: Well, detectives say there's growing evidence this attack was planned.
SUZIE SUH: And we've uncovered new information in this case. We have live team coverage. Rick Montanez has more on the victims, but we begin with KCAL9 Orange County reporter Michelle Gile live at the scene in Orange, where detectives just gave us an update, Michelle.
MICHELLE GILE: And you can see that the crime scene here behind me is still locked down nearly 24 hours after this shooter went on his rampage. We have also just gotten a new photo from police. This is it.
It's a screen grab of the suspect inside of the business that he allegedly targeted. You can see there's a gun in his right hand. He's dressed in dark clothes with a black bandanna and mirrored sunglasses.
TODD SPITZER: It appears that a little boy died in his mother's arms as she was trying to save him during this horrific massacre.
MICHELLE GILE: As police ran toward the gunfire, they discovered that a nine-year-old child was one of the four victims shot to death by this man at an office building in Orange officials say. The boy's mother, according to sources, survived the mass shooting, but is in critical condition at a hospital.
The 44-year-old suspect has been identified as Aminadab Gonzalez of Orange County. At a news conference, police said it appears that he locked his victims in the complex.
JENNIFER AMAT: It appears the suspect used a bicycle-type cable lock to secure the gates from the inside on both the north and the south sides of the courtyard.
MICHELLE GILE: Police say they fired through the locked gates as they rushed to the crime scene at Unified Homes on West Lincoln Avenue Wednesday night. The suspect was taken to the hospital with at least one gunshot wound.
TODD SPITZER: Officers had to engage the suspect from outside the premises until bolt cutters could be brought to the scene in order for them to gain entry to the premises. In the meantime, horrific rampage was going on in offices, and people were dying or were being shot.
MICHELLE GILE: According to the district attorney, this was no random act. The suspect and the victims have business and personal relationships, although officials weren't specific about a motive. Police found three deceased victims, a man and a woman at the business and another woman outside on a staircase landing. The suspect, according to sources, had a stockpile of ammunition.
JENNIFER AMAT: Investigators have recovered several items at the scene, including a semiautomatic handgun and a backpack containing pepper spray, handcuffs and ammunition, which we believe belonged to the suspect.
MICHELLE GILE: Police got to this business just two minutes after a flurry of 9-1-1 calls. They say they've discovered that he drove a rental car here, and that he lives in a motel in the city of Anaheim.
We're live in Orange. I'm Michelle Gile. Back to you.
JUAN FERNANDEZ: Michelle, thank you. We're also learning more about the victims that include a young--