- Video: Wheelchair-bound woman shot to death
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Detectives don't know who the suspects are, but they do believe they knew the victim because there was no forced entry and neighbors heard arguing before the shots were fired.
"She didn't deserve to go this way, I don't know, I don't know why they would do something like that to a lady," said David Valenzuela, Robinson's next-door neighbor.
Valenzuela lives next door to where the victim was shot. Robinson, 52, was disabled. She used a motorized wheelchair to get around.
"It's such a tragedy that can happen next door to us, in the blink of an eye," said Valenzuela.
Valenzuela and neighbor Kimberley Swartz were both home when it happened Thursday just before 4 p.m.
"I saw two men go in her house, and I heard her yell 'run' to the kids in there, and after that I heard 'pop pop' and saw them take off," said Swartz.
That's when Valenzuela ran inside the apartment, and saw Robinson lying there.
"I called out for Brenda, 'Brenda, are you OK?,' and I didn't get no response, so what I did was put my left hand on her shoulder to see if she's breathing, and I didn't feel nothing, so I said, 'She's gone,'" said Valenzuela.
There were three small children in another room of the apartment. They are unrelated to the victim, but sheriff's detectives will interview them.
The description of the suspects is very vague.
"One is a black male in his 20s, wearing a dark-colored beanie, another light-skinned black male with very short hair, 18 to 20, and at this time that's all the information that they have, so it's critical they can get some help from the public," said Cindy Beavers, San Bernardino County Sheriff's Dept. spokesperson.