At the height of his career, as the Fast & Furious movies were changing direction and growing in popularity, Paul Walker was involved in a car accident at a charity event for Reach Out Worldwide.
Both brothers appear in the trailer for I Am Paul Walker, as well.
He had previously starred in Fast & Furious 6 and had already filmed most of his scenes for Furious 7 at the time of his death.
His brothers Caleb and Cody helped to complete his remaining scenes so that the movie could come out intact.