Doomed To Die (1940)

Starring Boris Karloff, Marjorie Reynolds, Grant Withers, William Stelling, Catherine Craig
Directed by William Nigh
(actor & director credits courtesy IMDB.com)

When her friend's fiancee is accused of the murder of a shipping magnate, reporter Bobbie Logan calls in Mr. Wong to try and clear the young man. 

This was Boris Karloff's last go-round as Hugh Wiley's Oriental detective, and I found the script of the mystery, with a wealth of suspects and a few clever ideas, somewhat engaging before a hasty conclusion wraps things up without really spelling out the murderer's motive.  Static camerawork and too-dark scenery doesn't help matters, but there are some notable character actors in the cast, including Angelo Rossitto of Freaks in a brief appearance as a midget newsboy.  I found the film to fare no better or worse than Karloff's other Wong films, although the actor doesn't have much to do here, so overall I would rank this near the bottom of his filmography.