I did not say or imply that the reason he shot people in the parking lot was because staff hid.
Here is what you said.
"He shot people in the parking lot of PP. He couldn’t get to the employees in PP because the successfully implemented their security procedures."
As I said earlier, you did not qualify whether he was inside or outside when he shot them, leaving me free to believe he was. That is why I said you implied it.
Now, back on track, so to speak, you are saying that he walked up to a car and shot at the driver point blank through the window and missed ? Is it possible that the shots were coming from police who were trying to shoot him ? There were snipers on the roof.