That Woman Opposite (aka City After Midnight) (1957)

At a seaside town on the French coast, a series of robberies occurs. An English lord (Wilfrid Hyde White) thinks he recognizes the man who committed the robberies but he is murdered before he can make a positive identification. When his son's (Jack Watling) fiancee, a wealthy American (Phyllis Kirk), is accused of the murder, an insurance investigator (Dan O'Herlihy) sets out to prove her innocence. Based on the novel THE EMPEROR'S SNUFF BOX by John Dickson Carr and directed by Compton Bennett (1950's KING SOLOMON'S MINES). The plot is too contrived and full of too many coincidences to make for a fully satisfactory murder mystery and despite the intentional red herrings, it's not all that difficult to figure out whodunit. With Petula Clark in a non singing role as the murder victim's daughter, William Franklyn and Margaret Withers. Released in the U.S.A. under the title CITY AFTER MIDNIGHT.