A federal judge in California ruled Monday that Porsche Cars of North America is not at fault for the 2013 crash of the Porsche Carrera GT that killed actor Paul Walker.The suit had been brought by Kristine Rodas, the widow of the car’s driver, Roger Rodas. Walker, a star of the “Fast & Furious” films, was riding in the car with Rodas.Walker and Rodas were killed on November 30, 2013, ...