In the final moments of this call, the shooter's mother recognizes there have already been other emergency calls about her son. I cannot imagine the horror of a mother learning that it is already too late to stop her son from committing an unforgiveable act.
"He's non-violent, he's never done anything," the shooter's mother says.
The mother says she's shaking, trying to get into the car.
The dispatcher advises against going to the location, "it's dangerous there" the mother says she's going.