From the original People article regarding the 911 call-
"Brad Andres, who took the video, told the AP that his 19-year-old son Bridger called 911, noting that when police arrived, they “appeared to be like a death squad or a firing squad."
“They never once asked, ‘What is the situation, how can we help?’ They ran up with their guns drawn, they triggered a mentally disabled person to react and when he reacted ... they shot him," Andres said.
“This was really traumatic for me to watch, for me and my son to be a part of. My son was the one that called the 911 with the hopes of helping the family deal with the situation that was going on. He had no idea that what was going to transpire.”"
A 17-year-old boy in Idaho, whose family says he has autism and cerebral palsy, was shot by officers over the weekend after he was wielding a knife — which has prompted investigations into the incident.
people.com
That seems to imply that (at the very least) the caller's dad knew Victor was disabled. I wonder what exactly was said. I'd like to see the call, or at least a transcript of it, be released.