evidence: Dr Das describes the case of Beverley Allitt - the nurse known as the "Angel of Death" who murdered four babies and attempted to kill others in Grantham, Lincolnshire, in 1991 - as "eerily similar" in terms of how the children were attacked. Letby injected air into babies' bloodstreams and overdosed them with insulin, as did Allitt. [...] This conditioning can be even higher for women, as women make up such a small percentage of killers, she adds. "This is a feminine form of abuse, even though there are quite a few male doctors and male nurses who engage in healthcare serial killing. We as a society recognise masculine forms of violence - bludgeoning, shooting, stabbing, strangling, raping, those kinds of acts are overtly aggressive. What we as a society do not recognise are the covert or the feminine forms of violence - smothering, injecting, poisoning."