Thanks for being so prompt and detailed in reply.
The entire information in the article puts the professor at Justice Park when he interacted with Fields the driver. The Park fills the fourth block NE of the crash. Considering the weight of the gun (whose manufacturer's provocative post his was a reply to) and the crowds on the street it is highly unlikely he ran any meaningful part of the distance to chase down a moving car and cause the crash as the writer asserts without offering any evidence.
This crap is as fake as 'news' can get. It could only be worse if they'd invented the professor entirely, but at least then they might have made their fairytale believable.
Who actually reads this junk?
Let me start by saying that I also am not prepared to accept the reporting in relation to this story.
With that said, I agree that it is unlikely that the professor chased the car any further than away from his location near Justice Park (although the crash scene was only 3 small blocks away from there). For those who may jump to assumptions, the Unite the Right rally was permitted for a different park - Emancipation Park (several blocks away), so if the professor was at Justice Park (neither a permitted site nor the gathering point for the counter protesters) it must simply be where some counter protesters gathered
following the break up of the Emancipation Park rally. The vast majority of counter protesters marched south from Emancipation Park to Water Street and then east on Water (nowhere near Justice Park).
It would also be curious if Field's car had approached the crash from as far north as Justice Park, given that the car was filmed travelling east on Water Street only a few minutes before the crash, and given the layout of the streets (in particular one-way streets in the core), and where Field's would have had to have driven to emerge onto 4th street north of Justice Park. It doesn't seem to fit the timeline.
In short, I tend to believe that either the professor is lying (never had an interaction with Fields) or the reporting is unreliable. Takes me to the same place.