Desc: The Carter Case: Directed by William F. Haddock, Donald MacKenzie. With Herbert Rawlinson, Marguerite Marsh, Ethel Grey Terry, William Pike. Shelby Carter, owner of big chemical works, whose secret formula are being stolen and given to his competitors abroad, is driven by fear from his secret observation tower and killed by the mysterious 'Avion." His daughter, Anita, despite the protests of her fiancé, Lester Mason, calls in Craig Kennedy to solve the mystery of the death of her father and of the missing formula.