Scotland Yard Investigator

Scotland Yard Investigator is a 1945 American crime film directed by George Blair and starring C. Aubrey Smith, Erich von Stroheim and Stephanie Bachelor. Following the outbreak of the Second World War the Mona Lisa is moved to a London gallery for safekeeping, where a German art collector attempts to steal it. The film was a loose sequel to Republics 1944 thriller Secrets of Scotland Yard with a number of the same cast and crew.

While the National Gallery plans to safely retirn the painting, infamous art collector Carl Hoffmeyer, known as the Raffles of the art World, plans to steal it. He has stolen many fine pieces before, but this would certainly be the crown jewel of his collection.Hoffmeyers plan includes his two henchmen, Henri and Jules, who pose as the people from the Louvre arriving to collect the painting. But when Hoffmeyer gets his hands on it he concludes it is a forgery. He is unsure whether the gallery director is in on the scam, so he pays him a visit, reveals his part in the theft and tells the director of his suspicion. By Collisons reaction, Hoffmeyer concludes he was unaware of the scam. ........

Source: Wikipedia