Deep Crimson (1996) review

Lovesick nurse Coral Fabre (Regina Orozco), who has two children of her own and harbors fantasies of meeting a man who resembles Charles Boyer, answers a "Lonely Hearts" posting in the newspaper by vain womanizer Nicolás Estrella (Daniel Giménez Cacho) who robs her and leaves, but she tracks him down and vows to assist him in his criminal activities, so they drive around looking for women to manipulate and steal from (and kill).  Like Leonard Kastle's The Honeymoon Killers from 1970, it is also based on real-life couple Raymond Fernandez and Martha Beck's crimes in the late 1940's, and although it's impressive how committed Ripstein's movie is to being grim and cruel, it's still hard to identify with psychopaths who have zero redeemable qualities: Coral abandons her kids (and is a terrible medical worker) and Estrella is a heartless manipulator.  Most of the dialogue involves talking about Coral's obesity and stench, and the film itself offers virtually nothing in terms of psychological analysis ... except, perhaps, that crazies falling "in love" can be a dangerous thing for anyone near them.  You have to get a kick out of Mexico's version of the "death penalty": just start running while we shoot you in the back.