He hit somebody, who was it? https://wina-am.sagacom.com/files/2018/12/WINA-car-in-eviden... (from https://wina.com/news/064460-james-fields-trial-every-pictur...)
The coroner's report is available: https://bloximages.newyork1.vip.townnews.com/richmond.com/co...
in which you might note the cause of death is "blunt force injury to the torso" and the details include "complete transaction of the thoracic artery".