Erle Stanley Gardner 
D.A. Goes to Trial [EPUB ebook] 

The case started with a corpse. Nobody knew who he was. Next, a man named John Burke disappeared. But D.A. Doug Selby could not find his body.Then Mrs Burke swore that the corpse and her missing husband were one and the same man. This should have solved both mysteries. All it did was run the D.A. up two different trees. Sure, the faces of the dead man and John Burke were exactly the same. The only trouble was that their fingerprints were different!Impossible? That’s what Doug Selby thought too — until the killer struck again …