<p>In the second of Black Sheep's two-part episode on Elspeth Kerr, detectives unravel the mystery of 9-year old Betty Kerr's poisoning and uncover more potential victims of a beloved nurse, turned serial poisoner. </p><p><em>The Trials of Nurse Kerr: The anatomy of a secret poisoner by Scott Bainbridge</em></p><p><a href="https://www.rnz.co.nz/podcast/black-sheep?share=ee1808a5-fa8c-461c-b96d-6ecbd40e8946">Go to this episode on rnz.co.nz for more details</a></p>