The Man with 100 Faces (1938)

Jack Drake,a man with a hundred faces and in reality a modern-day Robin Hood known only as Crackerjack, thrills all England with his exploits of stealing from the rich and giving to the poor. As a guest at a society party "Crackerjack" steals some valuable pearls, and the next day learns there has also been a hold-up at the party and a man killed. and Scotland Yard considers Crackerjack to be the leader of the killer-gang, and he realizes that someone is using his name to cover their own crimes. And sets out to prove it without having to disclose who he really is.