Shadow of a Doubt (1943, USA) Directed by Alfred Hitchcock, Featuring Teresa Wright, Joseph Cotten

Charlotte “Charlie“ Newton is a bored teenage girl living in the idyllic town of Santa Rosa, California. She receives wonderful news: Her mother’s younger brother (her eponym), Charles Oakley, is arriving for a visit. Upon his arrival, everyone is delighted, especially young Charlie. As a gesture of affection, Uncle Charlie gives his niece an emerald ring. However, she notices that it has someone else’s initials engraved inside. Not long afterward, two men appear at the Newton home, trying to take Uncle Charlie’s picture. Young Charlie guesses they are undercover police detectives. One of them explains her uncle is one of two suspects who may be the “Merry Widow Murderer“. Charlie refuses to believe it at first, but learns that the initials engraved inside the ring he gave her match those of one of the murdered women. She then notices Uncle Charlie begin to act strangely.