And it is a complicated investigation with a number of suspects. All Chan knows is that Tanaverro has an alibi even though he is so suspicious the viewer can guess he is involved somehow. The case, as in all Golden Age mysteries, hinges on the tiniest of clues: scratches made by a pin embedded in the murderer's heel...
A highly enjoyable murder mystery only jarred by some of the sound issues and hesitant dialogue which often plagued early talkies. The identity of the murderer might seem a bit left field as the character did not appear nearly as much as other suspects. At this early stage in the Chan canon his assistant is the bumbling Kashimo (Otto Yamaoka) not one of his sons, though we do get a delightful scene where Chan has breakfast with all of his huge family!
