E-Brake would have not made hardly any difference. If it jumped forward 40 inches it may have only moved 36 with the E-Brake. The Camry was hit from underneath and thus most of the braking force would have been from the front wheels which were locked anyways.
2012 Nissan Altima 2.5s
2008 Range Rover Sport Supercharged
Previous BMWs (2008 135i, 2012 328i)