[Alberta's Child]

I've been saying for days that a criminal conviction here would be very difficult. I don't know his state of mind, but there is so much evidence here that adds up in the "reasonable doubt" category that I can't see a prosecutor even wanting to go to trial with a murder charge.

The single biggest point in the driver's favor is that everyone he hit was in the street. It doesn't mean it's OK to run them over, but it surely calls into question what his motivations were and what the culpability of the victims might be.

[Keyhopper]

They might not want a trial. Can you imagine some of the evidence that might arise.
And sir, where are you from? Idaho
And what do you do? I’m unemployed
Who paid for you way here?
Who paid for your room and food?
Who paid for all you poster?
Etc, etc

[Enchante]

This bit of video is not very distinct, but it looks like a protestor at the left rear of the grey car swings something to hit the rear of the car, just BEFORE the driver accelerates. This would definitely suggest that there was some violent antecedent which may have scared the driver:

Seconds Before C-ville Car Hit Crowd, a Camera Caught Game-Changing Act

Doesn't mean that stepping on the accelerator was legally or morally appropriate, but it does seem to support the idea it may have been a panic reaction rather than a pre-meditated attack.