As Campbell got out of the 1995 Chevy van, Fortner, who was in the driver's seat, opened her door to get a better look at Campbell's position.
That's when troopers say her large boxer bulldog suddenly ran up and jumped in the vehicle. The dog inadvertently stepped on the accelerator, slamming the van into Campbell before Fortner had time to react.
Campbell was pronounced dead at the scene.
Fortner also sustained minor injuries.
The incident is still under investigation, but no charges have been filed.