The Pranks(1931)

German-Italian crime drama with a racing milieu: The International criminal, "The Paw", who kills his victims with a prosthesis, has struck again! An engineer, who has designed a new racing car for the Italian firm Alberti has been found beaten to death. The plans for the car have been stolen. Rappis, the firm's director, takes part in the race and hits the finish line at the same time as the German racer, Peter Kruger. Then Rappis is found beaten to death, too.