The Voice of Destiny (1918)

When Charles Lind is stricken blind, his brother John takes charge of his business affairs, while his little niece Marie reads his mail to him each day so that he may recite his replies into a Dictaphone. After John confesses that he has lost a great deal of Charles' money on the stock market, the two quarrel, and John nearly strangles his brother. Later, a shot rings out, and John is seen crouching by Charles' lifeless body. Following John's arrest, the detectives guarding Marie's house recognize Briggs, the butler, as a wanted criminal, and when he attempts to escape, they shoot him. Marie, in playing with her uncle's Dictaphone, discovers that his murderer's voice was captured on the recording. Played at the dying butler's bedside, the recording leads to Briggs's confession and John's release from prison.