Framed for Murder (5/11/1938)

Bob McAllister is on trial for robbery and the murder of Joe Findlay. Lem Purvis doesn't believe Bob is guilty, despite the fact that the murder weapon was found in his possession. Lem is able to convince the Lone Ranger and Tonto that Bob was framed. Can they find the real murderer, before Bob is hung for a crime he didn't commit?