There are witnesses who described him pointing the gun and firing at random cars.
I have recently seen such reports, it is certainly possible. Shooter’s logic may have been this may help his flight, create distraction or traffic hazards for his pursuers.
Although a witness sight of a gun out of the window of a moving target is hardly clear what the intended target is/was.
I was basing my posts on the facts of reports of multiple shooters (there WERE multiple sources of fire!) and the recent episodes (released to the net on lapel LE video) of real incidences of LE thinking it is a good idea to fire at moving targets from moving targets on public roads.
Time will help the transparency of what really happened, I hope.