The Super Snooper(1934)

Andy is a rich and well-respected man. But he's concerned what sort of boyfriend his daughter might have gotten as she's talking marriage and her previous boyfriends were very short-term and he didn't like them very much. So, when he learns where this boyfriend works, he goes undercover as a porter there to spy on him. Unfortunately, he ends up befriending the wrong folks and thinks the boyfriend is a crook...when it's really these new 'friends' who are jewel thieves.