Nurse may have killed 20 patients

A former nurse who allegedly killed as many as 20 elderly patients by injecting their intravenous drips with chemicals is in police custody, Japanese media have reported. The suspect reportedly said she wanted to control when her patients died. Police said on Wednesday 31-year-old Ayumi Kuboki was in custody over the alleged murder of an 88-year-old man at a hospital in suburban Tokyo. They declined to confirm the broader investigation.