Lucy Letby’s parents have blasted a new documentary as a “complete invasion of privacy” for using footage of the former nurse being arrested in her pyjamas at their home. In their first public statement, Susan and John Letby also claimed the senior investigating officer in the case against their daughter “seemed to have a deep hatred” of them. The ex-neonatal nurse is the most prolific child serial killer in Britain, having been convicted of the murders of seven babies and the attempted murders