Lonely Hearts

Based on the true story, two homicide detectives track Martha Beck and Raymond Martinez Fernandez, a murderous pair known as the "Lonely Hearts Killers" who lured their victims through the personals.
In the late 1940s, a murderous couple known as the 'The Lonely Hearts Killers' kills close to a dozen people. Two detectives try to nab the duo who find their targets via the personals in the paper.