No one is saying that someone swerving their car at you is grounds for legally killing them. I am certainly not saying that either.
Someone swerving their car at you, while you are riding on the highway, is a serious infraction. I can understand why someone would want to make sure that the police would come to confront the situation. That seemed to be a serious road rage infraction, on her part, imo.
Now, we have a situation where the cyclist and 2 witnesses are allegedly on a public roadway, in front of her home, and the cyclist is speaking to the 911 dispatcher, about the incident.
At this point, there is NO REASON for the cyclist to pull his weapon. Everything is under control, as they await the officer's arrival.
However, once the woman, who they had followed home, suddenly comes outside, yelling at them and waving her gun around, and approaching them threateningly,[ according to Derr]---that <<< is when the question arises----does he have the grounds to shoot in self defense?
I do not know the answer to that question. I would not have fired at her, as quickly as he did. But then again, she had tried to run into him with her vehicle a few hours earlier, so that may have affected his decision. ?