I think the person standing in front of the car now might be with Frank? Was this ruled out? Maybe the sequence taken a few more runners back will show if the car left right after that or what that person did?
Agreed. It’s possible that the action starts from this vantage point a minute or two after Frankie goes past the camera. In subsequent photos of runners do we know if that car drives off?
I suppose it would be interesting to look at earlier photos to try to determine when that car arrived.
Honestly though, I’d be a little surprised if that’s an accomplice’s car because I think that car would always be one block off the course, driving on a parallel street.