“The Return of the Mucker“ is a novel by Edgar Rice Burroughs, an American fiction writer, who created such great characters as Tarzan and John Carter of Mars.
This is a second book in the Mucker series. 
Billy returns to his old Chicago haunts intending to clear his name. His time with Barbara imbued him with faith in the law and justice. However, he soon realizes that the system is more interested in finding someone guilty than in finding the guilty party. Awaiting the verdict, he reads that Barbara and Mallory are about to marry. He is found guilty and sentenced to life imprisonment.
Disillusioned, he jumps from the train carrying him to the state prison.