We start with a man putting a bomb in a car on the Mexican side of the border. When it explodes on the American side flattening the occupants, the local "Capt. Quinlan" (Orson Welles) decides to make a bit of a cursory investigation - in cahoots with his opposite number "Vargas" (Charlton Heston). Whilst they are out doing their sleuthing, "Susan Vargas" (Janet Leigh) is lured to a meeting with "Uncle Joe" (Akim Tamiroff) where it becomes clear that her husband is on the prosecuting side of a family dispute that is putting everyone in danger - something her husband finds out shortly afterwards when he narrowly avoids an acid facial. Now "Quinlan" and his sidekick "Menzies" (Joseph Calleia) have a rather unique way of working - the former intimidates just with his presence and has the District Attorney in his pocket, but as this investigation starts to spread out the original crime pails into insignificance as "Susan" finds herself trapped in an out of town motel and the potential victim of a ghastly drug crime that brings the threads of the story - and the true criminality to light - fatally. There are five principal characters and the actors do justice to them all - the story moves along darkly offering plenty of interest, the odd red herring and a particularly strong effort from Welles as the increasingly unlikeable policeman. I was slightly dubious about Heston playing a Mexican policeman, but here carries of the role in one of his better screen performances (when he is not wearing leather garments) and Janet Leigh - well, she was always an actor who made it all look effortless. The ending combines the scary with the brutal but will the truth be out? Big screen must for the full potency of the last twenty minutes.