This Dick Tracy movie has Boris Karloff as Gruesome where he uses a toxic gas to paralyze people and rob banks. This isn’t to be confused with the series of shorts. Look for the weird part around 10 minutes in where they kind of break the 4th wall and reference Boris Karloff.
Mystery Broadcast - 1943
A radio detective sets out to solve an old murder case, with the help of her sound man and another radio detective. They manage to talk to the people involved in the case, but shortly afterwards the main suspects turn up dead.
The Roaring Twenties - 1939
Three men attempt to make a living in Prohibitionist America after returning home from fighting together in World War I.