Prosecutors now accuse Jett McBride of using his car as a weapon last month in the attempted murder of Rayshawn Neely.
They also added a new allegation in the alleged assault on another PG&E worker.
McBride's case got national attention when Kai the Hitchhiker told the story of how he initially broke up the attack with his hatchet.
Neely is still in a wheelchair and recovering from his injuries.
Other PG&E workers eventually chased Kai away and subdued McBride until police arrived.
