Martina Cole's Lady Killers

Best-selling crime writer Martina Cole discovers the gruesome truth about female serial killers in this six-part series. Female killers have always confounded criminologists and police, and it’s still commonly believed that women are less capable of murder than men. But the reality is that women can be meticulous and methodical killers and, on average, it takes twice as long for police to catch them as their male counterparts.