A new Netflix documentary examines the case of the serial killer nurse and those who doubt her conviction For free real time breaking news alerts sent straight to your inbox sign up to our breaking news emails Sign up to our free breaking news emails Sign up to our free breaking news emails Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice A doctor who helped convict Lucy Letby has said he lives with “tiny, tiny guilt” that