To move very quickly. Dan roan, bbc news, sydney. This programme continues on bbc one. After a trial lasting 10 months, a jury decided nurse lucy letby deliberately injected seven babies with air, force fed others milk and poisoned some with insulin. Her victims included twins and two boys in a set of identical triplets, who she murdered within 2a hours of each other. Consultants who told Hospital Managers they had concerns about letby were forced to apologise to herfor raising suspicions. Well ask why bosses at the countess of Chester Hospital, where she worked, failed to investigate the deaths for so long. There is only one Serial Killer of babies. The Executive Team were not the people who were responsible for the deaths of those babies, but they had some opportunities to get to the bottom of what was happening. And why does a Health Professional trained to save lives become a Serial Killer . The person who kills within a Healthcare Setting has already developed the desire to kill,