The Lone Wolf in Mexico is a 1947 black-and-white mystery-action film directed by D. Ross Lederman for Columbia Pictures. It features Gerald Mohr as the title character, detective Lone Wolf. Chronologically the second-to-last Lone Wolf film in Columbia's theatrical series, it was followed by The Lone Wolf and His Lady (1949).
Former jewel looter Michael Lanyard (The Lone Wolf), who has since been working as a private investigator, is accused of murdering Leon, a Mexican casino operative at the El Paseo joint. This incident is succeeded by another murder, this time of Sharon, a jeweller's spouse and gambling addict. The Lone Wolf seeks to clear his name by tracking the mastermind down once and for all. Before he can, he is arrested but manages to escape. The film ends with a largely unresolved mystery.