Phantom of Chinatown

From IMDb : Detective James Lee Wong is on the scene as archeologist Dr. John Benton, recently returned from an expedition in China where a valuable ancient scroll was recovered, is murdered while giving a lecture on the expedition. Stars: Keye Luke, Grant Withers and Lotus Long This movie can also be found at The Internet Archive here and here . The Mr. Wong series of films Mr. Wong, Detective The Mystery of Mr. Wong Mr. Wong in Chinatown The Fatal Hour Doomed to Die Phantom of Chinatown