Reading from other media about these two folks, it appears that the 67 year old elderly guy has a long history of felony offenses, been in prison. and his neighbors were fearful of him.  The younger guy had his two kids with him in the car.  Somehow the argument escalated until the younger
one was shot and purposely run over.  Road rage? Or was the older guy just looking for anything to release his rage?  He belongs in prison for life.